Contracts Upgrading ***** happening in Cell C

My contract was upgraded without my knowledge. After asking access to voice recordings when the contract was upgraded, I got nothing from Cell C. The phone was also not delivered to the address that is reflected in their system. I live in Kimberley and the phone was delivered in Johannesburg. They couldn't provide proof that I have change my address! Which I didn't! I have reported the matter in October, but they were so unprofessional that they never attended to the matter and handed my account for collection. How to outside people get hold of confidential information? Cell C is not protecting their Customers, they support ***** and don't eve bother to undertake internal investigations. Their customer service is useless, they transferred me to all their departments and not even a single person can assist. This is so disgusting and unprofessional. Disappointing that telecommunication cannot make recording available to their customers, They do not qualify to be in Telecommunication business. They have affected my credit record. I have forwarded proof of communication to the collectors but they are also not getting feedback from Cell C. How UNPROFFESSIONAL.