[Solved] could i get custudy

mine and my ex daughter is 12 and has aspergers. over two months ago me and my ex went through mediation, it was a disaster. she complained saying they were all on my side ( which they wasnt and i didnt get it all my way. Also i have to agree with this one but didnt know how i could get it changed - We verbally agreed that my son out of my current relationship wud only come with me once a month when i have my daughter after i gained and build my bond bk up with my daughter. yet in the written report it mentioned my son along side my step kids as not being near our daughter. Yet we both signed it. but i have texts where she made clear she was happy about it. i left it two months before i took my son and she played [censored] saying that isnt was agreed in wrinting ( even though she b4 was complaing that it was wrong and knowing that is wat we agreed verbally.
Then two weeks b4 the kids are due to go back to school shes put our daughter in her fathers care ( no explanation why or for how long) All she would tell me is for how ever long it was needed. my mum then said she must be struggling and be respite for her. The first week i get told by my daughter Grandad that our daughter has stuff in her hair for headlice. that my ex had checked her two other kids, they clear. And thats she keeps getting them and she not happy. And that where ever shes been in the last seven days she must keep getting them there (meaning everytime she visits me ( which i thought the attitude was uncalled for.) the following weekend before i took my daughter back there was a txt from her mum saying well done .... you have now caused rats in the house through the state of your bedroom. Well in the past she has been unable to get our daughter to keep her room tidy shes always helping herself to stuff (at her mum not in my care) without asking. last time i had words and heard nothing scince so thought it had all stopped, Obviously not. even before now shes had social involved over her daughter behaviour. when i dropped her off at her grandads he couldnt greet her quick enough to have a go. he explaint to me that it took hour to clean the room. that he found her mum at morrisons in tears. that her room had hundreds of pounds worth of damange where she helped her self to her sibling and mum games and cds but where she just dumped them on the floor and been walked all over. also there was packets from food and sweets that shes helped her self too (causing the rats) and so on. that her mum saying that if she does it again that she going to get social services to take her because she cant cope. if they don't do out then she get police involved. before i dropped her off i offered to have her an extra night ( as bank holiday weekend) It was a no off the grandad and her mum texting sayingit was agreed sunday'sand begin of month saturday - sunday and thats wat it staying as and shudnt ask her dad as she has the end say on things. later i spoke to my mum . even before i left our daughters grandad asked could i take her in full time. i know it sounded selfish but i said no. I didnt explain why. But the fact that she dont want my partner or her kids near our daughter. plus i cant afford to give up work. and as you read futher down below even when my mum offers to help she wont allow it.
Later on i spoke to my mum. we both said no way will we let her go into care. my mum said txt her and say her and my dad will pick her up tomorrow and have her for week so me and my mum could have serious words with her. Like i said having her at my house would definatley be a no under her rules. so i txt her and she said no, saying it wasn't my mums job. i explained it was abt helping her. still she said no saying she didnt want her being treated or mia and co rubbed in her face. i knew what she meant refering to mia and co but txted her to ask wat she meant by it before replying. i txted her twice but was ignored. Shes on abt when my mum had her other grandkids one weekend. My parents have every right to have there there grandkids around i cant tell them it our daughter to only be there and my daughter has every right to see them. she winged at mediation that i dont support her when i try to i get refused. she says i dont do enough for her (like taking her out) Then when i have been doin i get digs abt spoiling her when she mis-behaves. how im i suppose to know if the mum doesnt tell me. and surely my time is my time with our daughter. i hate it when she has a go abt something then when i do comply with her rules shes still moaning. Rant over. My question is where do i stand if she gets social to take our daughter. Could i get custudy even though i dont have full parental rights. Even if my ex dis-agrees with me and my partner taking her on. If it does happen how do i start the ball rolling so to speak

Thanks

Darren