Refusal to cancel debit order after numerous calls

I cancelled my wife's car insurance with Budget, and at the same time cancelled my tracker. Yet I am still being billed by tracker for a service 1. I am not receiving, and 2. for a service that I have cancelled on 3 different occasions. <br> <br> I called the call center again on the 03/09/2015 at 10:18 and was given a reference no of 736161. Please cancel this debit order and refund all amounts into my account!!!!!