Worst Customer Experience Ever!

I cancelled my LTE contract with Telkom at the end of 30 March 2021 to be effective end of April 2021. I was then sent an email confirming that my request was received and cancellation has been done. I will be charged service fees end of May 2021. I paid all fees end of May 2021. I then received my statement for June and on that statement there are fees on there for April 2021 (which have already been paid) for all 4 contracts that are linked to me on the account. I called in to the service centre, spoke to 4 different people because, had 3 different case numbers logged. I then received an sms to say that my last case number has been resolved (***6). I called into the call centre again to follow up on the resolution because nobody called me with an update. I was then told that my case hasn't been looked at and has not been resolved and that it needs to be escalated to the back office! Its been a week since I logged my query and nobody can give me any feedback on what's happening with my query. This means that my debit order for June will be twice the normal debit order amount as I am being charged for April and June 2021. There is no manager or supervisor available for me to speak to. There is no urgency to help resolve my query and all i get told is "I must just wait, someone will look into it for me and call me or send me an email". This is the worst customer experience I have ever had.