How can i report this solicitor for lying to me which almost cost me losing me own child....?

i have a court case going on atm against my daughters father who doesnt have any custody or even on the birth certificate,,, basically i was away visiting family and because this man is a violent aggressive man he threat me he was gona do me for child abduction,.... offcourse i ddidnt believe a thing as he doesnt have any responsibility over her but funnily enough he made a huge lie to the courts and they took his case,,, when i came back i was shocked they had believed him enough to do a court case and was desperate for a solicitor ,, at the time i didnt know much about how IMPORTANT it was to get a family lawyer otherwise even a stranger could win against u.. so along the case he was giving me terrible advice and didnt know anything about family law and everytime i asked him something he shouted at me and said i was being a nuisance,, it got sooo bad that he shouted at me and told me to get out his office ,,,, i was very offended and felt abused as anyone else would and also realised why he was so frustrated because he was a tenant lawyer and had no idea of family law. i am very very angry about this that he didnt tell me he didnt specialise in family law and kept it a secret and it almost cost me losing my child to a violent aggressive man whos never has parental responsibility and never ever paid a penny in child support. now i managed to get myself a family lawyer who could not believe it either when i told her about this and said i should report this and its misconduct and abuse to the client. i am in receipt of legal aid so im not sure how i can report this terrible lier please if anyone knows please tell me i am so angry about a so called 'professional' abused my innocence.