Slow halting reception

For months I have been having reception troubles. In July a tech came out and said it was a result of a bad signal from the box on our street. "This whole street is bad". Someone came out, and it was a little better for a few months. Now worse than ever.

tech came last week, updated all our cable connections and boxes.  No improvement. 
how do I get them to look at the signal coming from the street.  He seemed uninterested in looking up the history from that visit.  How do I get to someone to review this problem?

i get lots of error codes all relating to signal problems, etc