HORRIBLE CUSTOMER SERVICE AT CELL C

I am absolutely disgusted with the service of Cell C!!!

I have a contract with them and i did an upgrade earlier this year, they did not update my contract and Debited my account for more then double the contract amount. I have been requesting a refund for the past 6 months and I still have no feedback after having numerous cases opened with them and numerous calls made to them. Team Leaders do not return calls yet they are always busy on other calls when you need to speak to them and the call Centre agents have no way of speaking to customers and helping them get in contact with higher management! I will never advise anyone to take a contract with cell c as their services are horrible!!