UK POLICE WONT TAKE A STATEMENT OR LET ME COMPLAIN TO A FEMALE INSPECTOR?

my 4yr old daughter has told me she was neglected/abused in her mothers care, i have also video taped large amounts of drugs laying around near her in her mothers care, all bagged and took to the police with the video evidence. The police refuse to take a statement regarding the allegations, refuse to take a statement about the drugs and refuse to let me complain to a female inspector...i can quantify this as i video`d the police refusing these things and also they have a video cam in the main reception where i tried to make the complaints/report the crimes. I believe this is a breach of my child's human rights but no-one seems to listen even though i have complained via the online complaints form to the police complaints authority....WHAT CAN I DO NOW PLEASE?