Discusting service

I have been trying since the 7th September 2020 to cancel my account as I have sold my vehicle. I have sent emails over and over only to be ignored, I have yet to receive a reply. I have now had enough of this and if you can't answer me and confirm cancellation or even acknowledge my emails then I will be contacting my bank to cancel the debit order. And trust me I will ensure that no one I know uses Netstar.