Lack of Service from Telkom in trying to sort out my account

In May 2018 I went into my local Telkom branch requesting that 4 sims on my account be cancelled. I was told that as they were part of my package I could not cancel them but as the contract was older than 24 month I could change the package and it was suggested to me that I downgrade. I have a downgrade reference dated 25 May 2018. These charges for the sims amount to over R300 per month. In June I paid a prorata amount (higher than my normal account) thinking things had been sorted. After many queries and just collecting reference numbers (even a dispute dated 10 July for which I am still awaiting a response). I am still paying the higher amount with those sims still on the account. I have been told they are still activated and being used yet no usage info appears on the account. On 11 August I again spoke to 4 different people. Still nothing has changed. It is now heading towards the end of September and I have still heard nothing except to receive the next account payable by the end of September and guess what; the sims charges still appear on the account. I have 5 references now. I am appalled at Telkom's lack of interest but I can understand why - they are still receiving the extra money every month. I would appreciate someone sorting this out. THEY HAVE THE CHEEK TO ASK ME WHY I RATED THEM 0 AFTER EVERY DEALING WITH THEM!!!!