Service being denied due to previous tenant

I recently moved into a new apartment and signed up for xFinity. Representatives came to my apartment to set up the modem and it was working perfectly for about two days. Without warning however, it was turned off. When I called to report the issue I was told my service had been deactivated due to an unpaid debt from the previous tenant at my address. I was told I’d have to go to a physical store in person to prove my identity was different from the old tenant, which I did with my driver‘s license and new lease agreement. I was then told at the store to call a certain support number and ask for collections and that they would take it from there. I called the number they gave me and spent almost an hour being disconnected multiple times and passed around to multiple departments who didn’t seem to communicate with each other, requiring me to explain the situation each time. I finally got hold of someone who said they could help reactivate my equipment, but ultimately all they told me was that a ticket had been created and I’d “get a call soon” as a follow-up. This is the third day without internet service and I still see the regular charges for service in my account, even though I am being denied use of it through no fault of my own. The instructions for getting things reactivated have been terrible and inconsistent and I still have no working internet. Trying my luck here to see if I can get anywhere. I’ve seen other people in the support threads having this issue and it seems like a really terrible approach to new customers who have nothing to do with a previous tenant’s account or lack of payment.