POOR SERVICE - CALL CENTER

I have been calling Cell C for the past two weeks for assistance. My account has been handed over to Nimble collections and I have paid the account in full last year December, however I called Cell Customer Care, then the contracts department to find out if my name has been cleared and that it shows my account has been paid up in full. Every time I call, I get transferred from pillar to post, from customer care, to contracts to retentions then back to customer care. This is the third time I am calling Cell C for assistance. I was asked to hold as some one in the contracts department will assist and then the phone gets put down. what kind of service is this ?????

What ****es me off is that they call you to make payment asap and the moment you as a customer pay the account in full you cannot get assistance ?! If someone can please assist me that would be great or I will definitely take this further.