TELUS Breached the Contract and keep sending me incorrect bill

I signed a two-year home service contract with TELUS in May 2024. However, TELUS had me sign another contract in November 2024 and again in May 2025. The monthly price increased from $45 to $50, and now to $71! Since November 2024, TELUS has never provided me with a correct bill. In January 2025, they sent my account to collections, but after I contacted TELUS, they removed my name. I am very anxious about my TELUS bill every month. Fortunately, I don’t have a mobile plan with TELUS. I want to know why TELUS sent me new contracts with higher monthly payments when I still had more than one year left on my original contract, and is it possible for TELUS’s billing department to issue a correct bill every month?