Billed Unjustifiably

I cancelled my plan, returned the hardware, and moved out of the US in April 2022. I even have emails proving this fact. After that, without my knowledge, Comcast continued to charge me and didn't "accept" my cancellation. It accrued 180$ in fees and I received emails from debt collectors regarding the matter. I reached out to the chat on X and was told it was transferred to Collections which can only be reached by phone. This is done by design. I want these fees and whatever consequences that occured from those fees to be reversed immediately. As I said, I have the emails on stand by. Don't tell me to reach out to Collections, notify them and end it.