UCAN

I am a Sprint customer 5 year+ and I have never had problems with them in the past. Currently they are charging me $844.85 for downloads and ringers my daughter downloaded from internet. I had all services blocked on old contracts , but when I bought my daughter this new phone they said she has 30 free internet access. I asked them to shut it off so there could be no mistakes made or charges entered. They told me a a Sprint Headquarters that it was part of the promotion and it couldn't be done. I was very annoyed with this answer because I do not always have my daughter (who is 14) with me. The result is Sprint auto withdrew $844.85 from my checking account for current charges and these downloads. I explained that my daughter is slow and when you allow free things to kids the temtation is to great. I offered to have Sprint erase all these downloads, but they refused and tell me I am responsible for all her charges. If I am responsible then I should have been notified of this irregular activity before it got out of hand. No one contacted me or made me aware. I have requested that these charges be credited back to my account because I was not made aware of the charges and I had asked them to shut off all services to her phone like her prior agreement had. I am asking what action I can take in this matter? If something like these downloads are going to be made available it should only be if authorized by a pin number that the parent would have to put in allowing the charge. Help me please.
Jeff