Robbing clients!

In June 2022 I paid showmax with my business card and cancelled my subscription, as I had to pay first before I can be able to cancel. However showmax has been debiting R99 every month while I do not have access to use it! When I login on showmax it says I must upgrade to a minimum of R49, therefore I am unable to complain on their site. On the 10 October I called FNB bank to dispute this and I was emailed showmax debit dispute forms that I filled in, scanned and emailed back same day within an hour. I was told that my money will be returned within 10 working days, however nothing has happened to date, as showmax debited again end of November. I have FNB bank reference number, as I can not complain on showmax without upgrade. I would like Showmax to pay back my R600 and stop debiting my account!