Ilegal debit order deduction request

I had a funeral policy 4 years ago with Clientele. I stopped it by contacting them and explain why I do not wish to carry on doing business with them, due to bad service with support. They agreed and allowed me to lapse the policy.

I was paying via debit order for 2 years and eventually my debit orders was stopped. I was happy.

Suddenly 15 months later now from November, December, and January 2024 and they will do that every other month going into the future.

Clientele iniate debit order deduction on my account again. Since I always remove all my money out of the account after I receive my monthly pension payment. There is no funds for them to receive. But my bank will keep on deduction of R7.50 for insufficient funds. The bank cannot help me to stop them as they will just use a new reference number every month. Thats what my Capitec Bank told me.

I've sent Clientele already 4 emails. But no response. I am deaf and so I cannot phone them.

How can I prevent these ******* looters of swindling me if I do leave money I my account