Netstar and Dotsure **** you with debit orders

Phone them this morning. Tried to explain to them Dotsure wrote off my car. I no longer have it. It has been s****ped yet Netstar are debiting my bank account for the cartrack device! I was amazed when their consultant told me the only way I could cancel the service was through the insurance company. I keep blocking the debit order but that costs me money! Only advice I can give is do not let your Insurance company bully you into using Netstar. And if you leave your insurance for any reason, insist on record that they cancel Netstar