Netstar inconsiderate and no common sense app****

My car was purchased through webuycars and they have installed netstar tracking device which was paid for part of my contract for 3 years, it's approaching the 3 year mark however regrettably my car was involved in a accident two months ago and it was a write off, I no longer Have the vehicle and netstar has issued a invoice , when I contacted the customer service department there was a high wait time further to this the agent canceled off the contract yet said I would be debited as they require a 30 day cancelation notice. I have told the agent from a common sense point of view I don't have the vehicle why must I pay for it, he said that's how the business works and not from a common sense point of view. They also don't have a complaints department and cannot honor a subject access request to remove my data from their data base - they are going to debit me this upcoming month for something I no longer have which is frustrating and doesn't make sense! I would not recommend anyone to take our tracking services with them as they are unreliable.