Adding Residential Internet Services to Exisiting Business Account

Hello,

I'm in the process of moving and I have Xfinity Business Class service at my office-I would like to add Residential Internet as well (No Cable or phone). It can be on the same bill.

The second part that makes this slightly tricky is the location I am moving to is an Xfinity Community thus the condo fees pay for Cable services from Comcast, but not internet. I cannot request services because there is already an account at the address.

Whom should I contact to have this done?