Credit for technician fee

Was charged for a technician to come out and swap their faulty brand new TV box. I tried the assistant twice with no credit or explanation. Called and was on hold for most of the 40 mins. They raised a ticket which I was notified via text to then have it closed before the guy on the phone was done explaining everything. 

How do I get a credit for this, it was xfinity that had the faulty box, no cables were replaced. This has to be the worst xfinity experience I have ever had.