Unhappy Xfinity Customer

I have been a LOYAL Xfinity CUSTOMER that has NEVER missed a payment!!!! In this almost 2 months, my service has not been working properly! Xfinity "VOLUNTARILY" sent technicians to my home to try to fix the issue, in which THEY DID ABSOLUTELY NOTHING!  I lost days of pay because I work from home and could not work because NO ONE COULD HEAR ME! I was given credit which would NEVER amount to loss of wages. Now, Xfinity has decided to add a fee to my bill for the technician coming out!!! I NEVER REQUESTED THE TECHNICIAN, WAS NEVER TOLD A NO TIME I WOULD BE CHARGED, NOR WAS IT EXPLAINED THAT I WOULD INCURE A FEE! I WAS TOLD THEY WERE SENT OUT AS A COURTSEY.  I feel like they are charging me for the credits I was given. I was told that the technician stated it was a equipment problem when in fact, they told me my equipment was fine and maybe it could be a lot of users at on time is the apartment building that cause the upload speed to drop to 0.65 instead of 30.0!!! UNBELIEVABLE!!!