Cell C disgusting service

I have been a Cell C customer for more than 10 years and up until now have had excellent service. The last 3 months the service has been absolutely disgusting. There have been faults on my account, debit orders that have not been taken off and now a statement saying an amount due of R1 451-79 was due on the 2nd August which I was told was in fact due in July, I paid this amount via EFT only for Cell C to then attempt to take a further amount of R2 957-50 which nobody can tell me why? Cell C did not take 2 of my Debit orders off which I then paid via EFT, their statements are incorrect and this has been going on for over 3 months now. After numerous phone calls I can only get through to a call centre and after emails and posts on the Cell C Facebook page I have received absolutely no help. The service is disgusting and I will not be paying Cell C any monies until such time as my account is sorted out!!!!