Nu Debt Management ***** and ************ *****ing money from my bank Account

Every month for the last year and a half this company has been debting ZAR299 from my ABSA bank account for my Planet Fitness Gym fees which I moved over from ABSA to Capitec the only reason I detected this ***** was because I did not have any money in my account this month I have tried to contact these ************ however I cannot get hold of anyone on the number the bank gave to me so for the last year and a half I have been paying double Gym fees I canceled my Gym Memenrship at Planet Fitness two months ago so there should be no reason for any debit orders to come off either my ABSA account or my Capitec account.Ithink this company needs to be reported the Council of Debt Collectors.