Paid for a services not provided

November 2019 I paid the provider R5200 which I requested to be refunded and yes it was refunded to only find that my banking details will be used by this company in future to run debits from my account (which I never authorized from the word go as my account with them has always been cash, I paid then December and January 2020 using the same method of cash. February 6 2020 I paid them what is due to them, then suddenly I receive an sms saying they will run a debit order on the 8th February 2020. Yes indeed the debit went off my account and it was a Saturday, I called them we all know no resolution comes from there until I spoke with them via Facebook and once again they wanted copies of ID proof that money went off my account and yes again my banking details so they can refund the money debited without authorization on the 8th Feb 2020, the money indeed was refunded on the 14th February 2020. I get home on the 25th February 2020 to find my service suspended and to my knowledge my billing date is the 8th to the 7th, I called them spoke to Amanda who was not really much help until I drummed into her what she could see on their system, after holding 11 minutes phone cut then called again to another lady I forgot her name had to relay the story again mind you I held for another 10 minutes before they discovered that someone from their billing department called Vincent reversed funds resulting in my service being suspended (by the way no money has been received into my account), I called again on the 26th February I once again had to relay the same thing. so are we paying for services we don't receive anymore all because I requested for my banking details to be removed from their system?