Telus kept charging me for a service that was not being used for past 2 years

Today I noticed that one of my credit cards was being charged for Telus Home security services that I had requested a cancellation for in November 2023. I had to move from my then address to a new place where telus did not have service. I requested for a complete cancellation and I was informed that I was in a contract for the Home service and needed to pay until the contract expired which was in February 2025. Since Telus charges a 1200$ for breaking a contract I agreed to pay for the service (which was not being used as I had already moved) just for the sake of not breaking a contract and was assured that it will be cancelled after the contract expired and I need not worry about it. Unfortunately that did not happened and after a discussion of over 1 hour 50 minutes over call, I was told that Telus cannot do anything about the bills that was being charged on my card. It is so unfair that for the sake of not breeching the contract I agreed for paying the contract period but was being charged beyond that too. I could have a removed my card from the account way before the contract and absconded which I did not as I am very faithful to any agreements committed and expected the same from Telus as well. Who can I approach after zero help from Billing and the Loyalty team. Is there a Billing dispute team that can help me on this?