Billing in the incorrect bank account and bad customer service

I called Telkom on 27th October requesting change of banking details for the November debit order. In November when Telkom debited my account they still used the old banking account instead of the new on provided and they didn't get any money in the account. i was charged fees for a failed debit order. i called Telkom to get the reference number and also amount to pay. My services were cut the same day. i made payment according to the reference number and amount provided to me. i followed up with Telkom as to whether they received my payment they indicated they received my payment but i used the wrong reference number that is why my services are not restored. The consultant spoke to the team leader and indicated that the only way to solve this is Telkom will refund me and then give me the correct reference number and also indicated the Team leader will give me a call later on how to resolve this. The team leader didnt call i followed up the next day i was told Telkom has a turnaround time of 2 to 48 Hours, but no action from the team leader. The following day i got 2 debit orders in the same old account i requested to be changed a million times. i was given a case number ********** 6. I followed on this case last week i was told they will contact me and still nobody contacted me. I followed up yesterday a consultant told me the case is due on 3rd January 2018 Telkom will contact me. Since today its the 3rd i contacted the Telkom to followup as the case is overdue, when spoke to the consultant Thulile Nxumalo she indicated the case was not submitted therefore no one was working on this and gave me a new case number ********** 9. This is 2 weeks after the case has been logged and nothing has been done. its been 3 months that i have been requesting my account number to be changed it is still not changed as i was debited in the wrong account for December. This is really poor service. My services were cut for over 2 weeks due to the incompetence of Telkom staff and also not actioning anything. This has caused a lot of inconvenience and losses for me as nobody at Telkom cares to do their Job other than empty promises that never materialize.