Forced to pay for useless service by being handed over

I first had a problem with the device installed in my vehicle and would get a lot of calls from the company informing me of a vehicle violation but could not get through to technical support. Than eventually got fed up wanted to cancel the contract but still would call customer support and cancellation but the phone rang without any response. Eventually got the attention when I reversed the debit order, but when I made it clear I wanted this debit order to be cancelled, again was pointed to the useless cancellation route. So today 22/07/2021 received a phone call saying I have been handed over. They is no contract binding me currently to this useless service.