Extra Charge for Previous Address's Cable Box

Hi everyone, I sent some messages a long while back trying to troubleshoot some things, but I didn't follow the protocol here and kind of gave up on them. I apologize if I was off-putting or negative back then, I was frustrated, but I apologize for any disconcerting demeanor. - Anyway to the present, I have a question about a previous address of mine. I'm responsible for the cable box that we used in that previous apartment (this is public, so I won't post it here), but I've already said that I have no idea where that cable box is. Since xfinity had a contract with my old apartment group/company, which was stressed because we had to use your package, I assumed I could leave the cable box in the old apartment. Thus, I have no idea where that cable box is because I haven't lived in that apartment since 3/26/2025. I have had uncountable texts and messages about a cable box, threatening fees and adding fees to my monthly cable plan. One day I received a $100 bill from Xfinity which I assumed was a one-time-payment to pay off the lost cable box, so we could be done with things. I paid the $100 and thought that was that. It was not. I continue to receive "Please return your unused cable equipment to lessen your monthly payment or reduce a potential future fee," messages. So first, where did my $100 go, second, why do I continue to receive messages, and third, why can I not close my old address (on my xfinity account) that I haven't lived in in over a year now?

Thank you for your time and energy on this matter.

I think I did the category and topic correctly. Please let me know if I did not. Thank you.