A simple cancelation nightmare

I purchased a course on their website which i thought will be a great opportunity to better myself. I went on to accept the terms and conditions and ans accept the Debicheck for my monthly debit orders from them via my bank. However after careful consideration, I realises I was not going to be able to afford the course I immediately, the same day on the 19th of February 2026 , sent an email to cancel my application, however they have not responded and never answer calls till this day..I would like to cancel my application but they making it hard for me to do so, however they keep taking payments. Inwould like to cancel my debit order to but cannot do so tgrough my bank because Accelerate need to cancel from their side..