Cell C accounts and Legal departments are useless

I have contacted Cell C on numerous occasions regarding them not updating their systems, I have emailed, phoned their accounts department, Legal department normal consultants. I had an account with Cell C about 4 years ago and lost my work right before the contract ended. They handed me over to Nimble which I then settled got the settlement letters from Nimble forwarded it to all the various departments at Cell C and they simply just give you a new case no when you query the old case no. This has been going on now Since the 28th of March 2022 I phone them on a daily basis and forward them all the previous case no's and messages so that they can see. on Thursday 26 March 2022 I received a phone call from them stating they have looked into my case and will have their system updated within a couple of hours, then I received an email saying it will be resolved within 48hrs well the 48hrs have been surpassed by another 48hrs. They are the most *********** company ever I just want my name cleared so that I can move on with my life