Moving Oct 28

Hello, I'll provide addresses in private chat.  They are both in Jacksonville, FL.  (The to and the from)

My Roommate, who already is living at the place, has ACP internet.  

Once I move in, I will be providing the high speed internet I now have at my current address.

My main questions are:

Which phone number would she need to call to cancel her ACP? 

And what is the timeline for that in order to get my services set up with minimum loss of service time to the new place?  It's crucial as I work from home!

Thanks in advance!