Cancelling of any business with The Unlimited

I was with the company for the past 7 years without claiming, with a monthly debit order going through. I then experienced dents on my car in 2022, and when I reported, they gladly responded by referring me to a few panel beaters. I then went to two panel beaters and the total cost was over R10 000. I then went back to the company and they told me that I qualify for R5 000. I then informed The Unlimited that I am not prepared to pay the difference I then decided to cancel the contract, but they are continuing to deduct to this day. I request that The Unlimited to STOP the debit order on my account. I have been cancelling the debit order on my app, but they are able to change the reference number and continue deducting.