MiWay force a policy payment on a vehicle I no longer own - I've immigrated!

I sold my car and immigrated, notified MiWay insurance, however keep getting message mails from Retention agents who are trying to contact me on a number no longer in use, and along with the message a statement that I will still pay for Insurance. With so many digital advancements in the industry I find it highly ********* that one is forced to talk to a retention agent, whose role is to "save" the policy. I am paying insurance for a vehicle I do not own, and MiWay have yet to respond to my complaint. Where in the T & C's is this noted that one may only cancel via a retention agent?