Netstar charges customers for cancelled contracts

Over a year ago I sold my car and contacted Netstar to cancel my contract. Till this day the debit order still goes off. This is ridiculous daylight *******!

I have been in contact endlessly with Netstar to find out why they are still collecting the debit order. Everytime I call I'm informed that the contract is cancelled yet every month the debit order goes off.

I have been reversing the debit order and now I'm getting blacklist thread from Netstar. What exactly is Netstar still making me pay for? This is utter incompetence!!! Netstar fix this issue ASAP!