Cartrack harassment

I have been incessantly harassed and harangued by Cartrack. Firstly, i was forced to take out a contract with them because I bought a car through their sister/affiliate company Carzuka.As i loved and wanted the car i relented. I had another car and when this other car was sold i realised that I had been charged two different rates from the car i bought from Carzuka. When i pointed this out Cartrack pulled their favourite gem and threatened all sorts of things against me. Then the running contract was due to end in December 2025 and as early as October I sent them an email notifying Cartrack that I was not going to renew the contract and once more they promised me all sorts of legal consequences. After I complained via HelloPeter they send and a cancellation confirmation in December 2025. Now they have started a new round of harassing emails and phone calls saying that I owe them a subscription fee for January. In effect they owe me thousands for the second sub i was paying for the same car. Can you really believe this!!!! And this is a company that has admitted that it does not allow its staff to use lift!!!!