Cancellation not honored and bad customer service (Rude Agents)

So Car Track has recordings which are for aesthetic purpose and when you request one it is not made available. Is it because of their rude consultants, from the phone ones to the ones managing their Whatsapp. Who are all a bunch of ***** who dont know what they are doing. So now they are demanding me to pay a fee for a car that I requested them to cancel in December bearing in mind that the car in question had a device which was already belonging to me. I didnt have to pay for any cancellation fee. Now I am being threatened with an either I pay the premium they are demanding or my account will be suspended. Pay extra whilst when I authorised all those debit orders your *********** consultants thought were for my old car only to find out they are for the new one. On top of that after she promised to fix the matter it only got worse because you people feel entitled to my money now telling me that I have to pay for a service that I didnt utilise even though I have demanded the recording of the phone call I made in December for the cancellation. So now you are harassing me and sending me threats on a daily because of your mistakes.