FED UP WITH MULTICHOICE!!!!!

I am a FNB customer; Multichoice keeps making unauthorised debits against my account FNB have advised that all I can do each time is raise a dispute, this is exhausting, other than closing my FNB account and moving to another bank where Multichoice does not have my bank account details, is there another option. I have spoken to Multichoice the last time they did this in October 2019, they promised that they would flag my account, something must have changed again, 01 Feb they helped themselves again.