*****ing from me and other customers

Cell c call centre services is the worst, I upgraded my contract which I was told will cost 399 monthly but 439 has been debited on my account and on to of that a 697 was debit this month with out me being in arrears and I phoned the call centre and the logged a case and I waited for feedback and was only sent a stupid sms I couldn't understand, all I want is my money back, you can't debit whatever amount suits you in my account. I am sick and tired of cellc their service is beyond poor.