Banking details incorrect

Ok this is now enough.. I have asked planet fitness benoni to sort out my banking details for almost a year now and they still can't get it right .. Johan keeps on telling me it's sorted but every month I have to pay manually and ontop of this I get charged an extra amount of R20 because my debit order bounced ?? They don't even have my correct banking details so how can my debit order bounce .. **** this is frustrating.. Please can someone recitfy this nonsense ..