What is the technician cost for reconfiguring a coax cable wiring in my home?

I was wondering what the expected cost was for having a technician come over to my condominium and reconfigure a coax cable in our second-story room. It has a pre-existing coax cable installed in the room, which is seemingly hanging loosely in the wall because installing the xFi device there was not working, whereas the coax cable downstairs is working.

As per a previous forum post mentioned, 

"Any repairs, replacements or reconfigurations of the wiring in the customer’s home. Xfinity is not responsible for in-home wiring, regardless of original installation, nor do our technicians perform custom work including wall fishing."

was a service that would cost something, and I'm curious as to what the cost may be and what additional fees I would need to expect if things were to become more complicated.