Canceled membership still deducting from my bank account.

This reward program is not working for me. I wrote emails to them from July cancelling my membership. They promise to cancel and be refunded my money from Sept and October nothing has been done instead they deducted again today the 31of October. Last month I went to my bank to try and stop this transaction they could help because it comes as a purchase not debit order that is ***** basically. You can't cancel you can't stop ithis transaction. To my understanding it was supposed to be debit order not purchasing from my account.Dissappointing