Service being denied due to previous tenant balance

I'm moving into a new apartment and need to set up internet access through Xfinity. But Xfinity told me that the previous tenant has an unpaid balance (and according to the landlord, that was not the only issue). Xfinity said that they would not be able to provide service to that location because of the previous tenant not paying their bill/s. What can I do so that we can get the service set up? I have more than 5 years with xfinity with no problems and now cant access to the service. 

[Edited: "Guideline Violation"]