Cancellation Error

I have two television sets that were under a maintenance contract / plan. A Hisense and a Sony.

I phoned and asked for the maintenance on the Hisense to be cancelled. I later found out both had been cancelled. I have tried three times with three of your customer service representatives to get the Sony maintenance contract reinstated with no luck. I keep getting told by each person that they will "look into it and get back to me" but I never hear from them again. I have been a Teljoy customer for decades and this is the service I get. Not impressed.