technician fee

I have been suffering from spotty cable & internet in my house since last summer, most notably in my main bedroom, where the wireless box goes in and out and freezes.  Not all the internet devices stay connected in that room, and the coverage is slow in other places in the home.

I have spoken to and communicated with customer service on multiple occasions since last summer.  I had a technician come out and address it in last month.  He checked inside and outside and then said he thought it was a problem at the street.  The problem was NOT fixed.  I still have spotty outages.

I got my bill this month and was assessed a $100 fee for the visit.  So, why was I assessed a fee for a problem addressed at the street that still hasn't been fixed?  I am frustrated with the level of support and the charges (my bill also went up last month) for a completely substandard product.