Bad customer service,for error of Cell C agent

I purchased a contract cellphone on my mothers name, but requested that the amount be deducted from my account,it all went smoothly until I had to change banks. I called in and sent through my banking details,they received confirmation from my mother (the account holder) and the change was processed.<br> however the agent attending to my call switched all the existing contracts on to my account and i was not informed,until I noticed it on the day I received my salary. My mother and I both enquired about the change on four occasions and received the worst service and response to the issue!! They then started to deduct from an account that was not approved by the account holder. As a result the payment did not go through and I was contacted by faith from the accounts department who refused to listen to the issue and instead was extremely rude!! when I asked for a reference for the call or any details,so I could report it she said she had nothing more to say to me. My mother and I are not at all pleased with the service we received from Cell C.