CANCELLED MY CAR TRACKER BUT STILL NOTHING AFTER 2 YEARS

I CANCELLED MY CAR TRACKER 2 YEARS AGO WHEN I BOUGHT MY NEW CAR , THEY TOLD ME I STILL HAVE PAY 6 MONTHS. THAT THEY MUST PUT TRACKER FROM OLD CAR TO NEW CAR, IT BEEN 2 YEARS THE TRACKER STILL IN OLD CAR CAN IT STILL NOT IN NEW CAR AND THEY STILL COLLECT THE DEBIT ODER EVERY MONTHS I WANT THIS TO BE CANCELLED AND I WANT TO BE REFUNDED FOR THE 2 YEARS THAT I PAY FOR SOMETHING THAT NOT BEEN IN MY CAR