Bad service no follow up

I have been calling the call centre from 12 November every single day to request a usage report, due to my bill being so high. Each day I was promised that I would receive my usage report for that day. On all my recordings you can hear that I have requested the report due to my bill being so high, and I would like to understand why. To add to this they still have the audacity to deduct the R49 (which may not seem like a lot, but it is considering I don't have the report) for the usage report from my account. But still no report. I have been with Virgin Mobile for 6 years, paid on time EVERY single month. And i request 1 months usage report and I don't get it. But yet I still continue to pay, because then they will cut my services, and then I have a bad credit record? I really just want to cancel this contract and cancel it without paying them a cent, because I have spent so much on this network already.