Clientele perks must stop attempting to debit from my account

My name is Nompumelelo Chauke I had initially signed up for clientele perks which I decided I do boot need and stopped the debit mandate or debit check. However they keep on attempting to debit from my account. I sent an email however they are not helping. This is frustrating as it is causing unnecessary bank charges that I shouldn’t have to pay because in cancelled. I need them to stop attempting to debit from my bank account as it’s frustrating me I cancelled so they must cancel it on their side. Hello Peter please help me to make them stop. This are my details

Plan No. *** | Active Clientèle Perks Member: Nompumelelo Chauke Kind regards Nompumelelo