Please help

When I got the service of Xfinity Internet I was living in an apartment. Due to unforeseen circumstances, I moved out of said apartment 2 months later. I never used my Internet services with Xfinity again, haven't even plugged in the equipment back in since then. That was last year. Despite not utilizing the service (and trying to cancel twice thru Xfinity chat), I've still been paying the monthly service fee of like $25. Only recently these last two months, have I turned off the auto pay option for the monthly bill because I planned on returning the Xfinity equipment. I assumed I'd have to pay the $25 monthly fee that I missed but my account showed an over $100 balance. I just put down $50 on the bill and was hoping to be in the clear for the rest as again I've not used the service in months (which I'm sure your team would be able to verify) and I also tried cancelling the service on multiple occurrences (which can be verified by my old chat history which I hope you can look up). I've tried looking for an email because I explain situations better over written communication due to a speech impediment I have, but haven't been able to find one anywhere.