Telkom - worst service ever

I used to have a LTE internet account with Telkom. Once Fiber became available in my area I contacted Telkom to cancel my LTE account, which was already out of contract, and to sign up for a fiber account. The cancellation and new signup was all done telephonically with the consultant. Eventually my fiber was installed and then a few months later I received notification that my LTE account was over due. I queried this with Telkom as it was already cancelled and they said they will "investigate". I had to follow up numerous times as i did not receive any feedback from them. This all happened over 2 years ago. Then in the first half on 2023 while i was still querying this it all went quiet and when i contacted the accounts department i was told that there is no money due on my account. This is now again over a year later and out of the blue i received a notification from a Debt Collector to say i have an overdue account with Telkom. I contact Telkom again to find out what is going on but got referred from department to department. Eventually i was told that the money was written off as bad debt in the first half of 2023. I once again had to tell them they messed up and I received a Ref. No. for a case they logged to investigate. Then as usual with them i received no feedback. When i phoned back and eventually got hold of someone who could assist me they found that the Case was referred to one department who then claimed it has nothing to do with them so it was sent to another department who then did nothing about it. I was told it will be escalated but still more than a week later there has been no response. I have sent numerous e-mail also over the years but to date, no response has been received. Telkom customer service is the worst i have ever come across. This has been going on for over 2 years now with not being closer to being resolved yet.......