Poor service

I had a Cell C contract and paid up the account. Only to find when I check my credit report, they have listed the account as in arrears which ****es one off cause when I call the contact centre nobody is able to assist and their so call management/ Team Leader (LMaahlamela) was to assist me has not even contacted me after an email was sent to him or her that I would be assisted. Really disappointed at the service I have received as a company that I had previously worked for. The standard of service has really gone downwards as this is not my first contract with them and surely this is my last contract I'll ever take with the company.