How do I make an appointment for a technician?

I had a phone call from someone who said they needed to upgrade my Xfinity software.  He was not a native English speaker and I couldn't tell most of what he was  saying.  He told me to removed the wires to my two boxes, which I did.  I had limited access since both were secured in wood paneling.  I tried.  He evidently hung up on me and now I can determine where all the wires go.  Could I have a tech make a house call and hook up my secondary small box?