Safe Home Security review: Cancellation of my service

I have been in conversation with Safe Home Security since 5/7/24 in anticipation of ending my service in October 2024.
Initially, I sent a letter in May notifying SHS of my intention of ending service effective January 2025. After reviewing my contract, I realized I only needed to meet 90% of the contract funds to cancel and with no penalty. This entitled me to cancel effective Oct vs January. I immediately sent an email to Shane Manzo, Director of Services, and the person I’d been talking with, about my update and that I’d reach my contractual requirements in Oct 2024 rather than Jan 2025. I asked for a written response but did not receive one. Something I ran up against repetitively with SHS, specifically Mr Manzo.
After 15 calls/emails from May ‘24 to Jan ‘25 trying to have a smooth transition, I continue to receive a bill for service for Nov and Dec. though my last auto withdrawal was Oct. Trying to rectify this and repetitively being assured by Mr Manzo that he would correct the problem to no avail….well, it’s caused so much stress and frustration. I don’t wish this situation on anyone. I need assistance dealing with this.