They tie you in and you can't get out

We have tried to cancel our tracker cover with Matrix since the beginning of the year. Emailed every single email address, spent hours on the phone. Yet still being charged and this is impacting my credit score as a result of me constantly having to reverse debit orders. I received emails asking for money but no one ever gets back to me about the cancellation I gave notice for. Quick to tie people in and there is no way out. Daylight ******* which has affected my personal credit score. I will never recommend this company and would like someone to actually accept the cancellation and acknowledge it and stop harassing and charging for something that I've cancelled months ago.