unacceptable service

I am the owner of 3 contracts with cell c, 1 of which is constantly being barred due to non payment. Every time i contact customer care to query the matter, i find that the account is fully up to date and i get an apology for any inconvenience caused. I've brushed off alot regarding these contracts including a call from the accounts division where they insisted the account was in arrears, only to have to call customer care again to rectify the issue. However today was the last straw, i received a sms stating that the account has been handed to XDS a registered credit bureau due to non payment. I've officially had enough of cell c and once my contracts have run their course i will be terminating with immediate effect and joining with another service provider as they simply cannot seem to resolve my matter.