Difficulty in Cancelling Services

Since July of 2025, I have been struggling getting my services cancelled. Our bills used to run $157/month, but in July they jumped to $300.96. We called Customer Service, emailed our Sales Representative (and several others) and have not been successful. The bill did drop to $55.95 for two months, which we paid (August 2025, September 2025) so we were hopeful. We called and were assured our services had been cancelled, and out account had a zero balance, it would just take a few billing cycles to sort it out. Then October's bill arrived: $562.21!! We again called and were speaking to a representative and were waiting to connect with a manager, when the call was disconnected. More bills arrived with late fees, Several more calls and emails to our Sales rep, continued bills, now a collection email. I cant seem to find an email to send my timeline of issues to. I am responding to the collection email, but wanted to also reach out again to Comcast. I don't relish another long phone call.