Treated unfairly and taken for a ride

I had an extended service plan cover with, and the agent was speaking fast, I was cover for 80k_100k km or Jan 2021 whichever comes first. Now both have come an end and they say now my premium cannot be stopped because it is bonded to my car installment until it is paid for and they do not cover me, really who wants to do that. First I did not received the contract any their sale. I asked them to stop the debit order and they refuse. The agent didn't explain Effectively and didn't send me a contract, I was not asked if I am comfortable to speak in my language. They need to stop the debit order because I didn't not sign anything.