Telkom's Pathetic Billing and Customer Service

My Telkom account number is ***. I changed my fiber plan on the 4 of June 2024 to a cheaper fiber plan because Telkom had increased my speed to a more expensive plan which I could not afford. I told the lady that The debit order should be deducted on the last day of the month. A few days later I changed the debit order for Telkom from my banking account to be deducted from my son's banking account but still the payment date was to be the 31 or 30 of every month. Than in July Telkom debited my son's account on 25 July 2024 so the debit order bounced because there was no money in the account and because it was supposed to be debited on the 31 July 2024. We went and paid the account at Pick & Pay on the 26 July 2024. On the 30 July I called Telkom to query the payment date and ask why the account was debited on the 25 July 2024 instead of the 31 July 2024. I spoke to a lady by the name of Mbali she said they will investigate and she gave me a ref no for the call which is *** and said that they will get back to me. I never got feed back from them until Today when I received my new bill for the month. On the new bill I am being charged a double payment. I called Telkom immediately and spoke to a lady to query why I was being charged double the amount and I explained the whiole story to her. She than told me to hold on the line which I did for a very long time in that time I received 2 sms's on my phone with the ref no ***6. When she came back to me she told me that she had escalated my query and that is the ref no for the call I need to check my next bill to see the changes. When I tried to get some clarification on what the problem actually was she dropped the call. I than called Telkom again and spoke to a lady by the name of Jabulele. Jabulele told me that it is because I changed the debit order date. And I should have thought that I could not pay R62 for a bill because there is no internet service that cost R62. But I did not pay R62 I paid R399 on the 26 July 2024. I never changed my date of the debit order Telkom did. And now Me as a customer is being punished for something that is not my fault. I really need someone that will be able to help me sort out this because every time I call Telkom I speak to someone different that tells me a different story. I am so frustrated I feel like cancelling my Telkom service. I have been a customer of Telkom for so many years and every time I change something they mess up my bill and than I have to fight and struggle like this. The customer service is really pathetic. I am really very tired of this treatment.