I have a smell coming through the vents so I wanted someone to check my vents for damage close to any sewage piping. They sent out their "plumber" to diagnose. He did nothing except walk inside and say call Roto-Router. This was connected to a "home warranty" service and this company has the nerve to tell the home warranty company this is not covered. How is it not covered, the guy did nothing but walk in my house and say call someone else.
I say follow their own recommendations, call someone else.