Incorrect billing from Vodacom and failing ro resolve after 6 attempts.

I have been a Vodacom customer for over 20 years, but am utterly disgusted and, frustrated, highly irate with Vodacom. In June 2 of my linked numbers on my account were upgraded from 20GB date contract to 30GB. I dont even have knowledge of this. These were just purely sim contracts. Vodacom being Vodacom charged me R2,616.25 Cell phone subsidy fee for both contracts amount to R5232,50. I picked up this incorrect billing on my invoice on 07 July 2020 when reviewing my statement. I then called vodacom on the 10 July 2020 speaking to a consultant (Shirlley) lodging a query and spending more then 30 minutes on the phone with her. My time is valuable and I lost billing hours due to this. Shirley committed to get back to me on Monday 13 July 2020, but did not happen. I then called again into the call centre on the 17 July 2020 and ask to speak to Shirley and was told that Shirley would return my call, but this once again did not happen. My 3rd call to Vodacom was made on Monday 20 July 2020. This time spoke to consultant named Dudu. I once again had to explain the incorrect billing and wasting more than 40 minutes of my time. Dudu confirmed that she has put a stop to the debit order which will go off the 01 August 2020 while the billing is being resolved. To my dismay the Debit order went off with the incorrect amount. I then called into the call centre on the 3rd August 2020 and asked to speak to a manager or supervisor who can resolve my billing issues. I was put through to Zandile. Zandile committed to coming back to me later in the day, but once again this did not happen. I then called on 06th Aug and spoke to Zandile once again. He then assured me that he will get the sales department to call me within the hour and he will follow up with me after an hour or 2. Once again, the sales team neither Zandile called me. We are now on 08 Aug 2020.

Utterly frustrated, and considering cancelling on my contracts with Vodacom. I am now out of pocket but Vodacom does not seem to be bothered. A big company being a bully and showing a no care attitude.