Telkom is the absolute worst

I had an account with Telkom in 2017. 2017 October that account was transferred to the new tenants. After the account was transferred I was still being deducted. After multiple calls to them to stop debiting me incorrectly as the account was transferred no amendments were made. I stopped the debit orders from my side in 2018 after another call to them to correct their error.

Telkom just kept on debiting me and created a bad payment profile on my ITC. I opened the case with the NCC on 2018/09/05 for assistance.

I received a call from Telkom 2 weeks later stating that they need to make sure who was using the data on the account which was transferred to a new owner and now in 2019 absolutely nothing was done and I receive a petty email stating that I still owe money on a account.

How in the hell can I be charged for an account that was closed and transfered to a new account holder?