Stop billing me

So, late November 2017 I contacted iWYZE, discussed with the consultant that it should start collecting as of the 01-December 2017. I have unfortunately forgotten the lady's name. She told me that I had to take my car to any Glassfit for an assessment and until that is done, I will not he covered. Fast forward, work got hectic and I never got the chance to get around to it, which I'm thankful for , because I quickly realised that iWYZE isn't what I needed, I called them to cancel my contract, and I understood that the debit order request had already been sent so I told the consultant that I would just make sure there are no funds in my account.

Now, it's 2 months later and they are still trying to debit my account and in turn, accumulating bank chargers for my bank account.

Can you please stop trying to debit my account. I have no business with you guys.