Bad attitude and unauthorized billing

Unbeknownst to me, my account was being debited for small amounts for two and a half years. I only realized this when one of my debit orders was returned. The company eventually said that they could not verify that I had agreed to the contract as the recording was "*******ed" and they offered to pay back 6months. It's a couple of weeks later and a lot of back and forthing, and I have to receive a single cent. They reckon that the payment was made to me on 10 August and that it takes 2-3 working days to reflect. i've been in touch with my bank and nothing has been paid into my account. the lady that I deal with at Mobiles Plus also uses a tone in her emails that ake it seem that I'm an imbecile. We needto expose them They are affilliated with Mr P mobile who also took me for a ride last year.