Sudden slow upload speeds

Just got off support chat which was a waste of time.  I'm not taking a day off work to have a tech come out and tell me that everything looks fine. 

I'm getting 20-50Mb down and 0.0Mb - 0.2Mb upload.  Completely unacceptable.   How do I get phone support from someone that actually knows how to do something other than reset my modem?