American Home Shield AHS does not Complete repairs, leaving systems in DANGEROUS, UNSAFE conditions Internet

I have had AHS since 1999 for my home, and the service is getting worse and now DANGEROUS. 
I had a hot water line break under my sink on Sunday. I called up to get emergency service requested but the stupid agent just put it in as a "whenever-no rush" request.  I fussed on Monday morning to get it changed to emergency, had to cancel the one plumber to get their national buddy company  ARS/rescue Rooter to come. Technician arrived at 5 pm (3 hours late) and he fixed the copper pipe line (very nice job) but FAILED to replace the spring loaded safety valve on the pipe that ensures that the piping doesn't overpressurize! 
I called Tues. and Wed. morning to get them to put in the paperwork (plumber who came refused to call to get authorization) so that the next step could be done, perhaps by another company.   I called AHS and the agent was useless. Asked for a supervisor but got connected to someone in the "authorization" group.  She said the safety valve isn't covered and she went on and on.
I clarified that this could cause MORE PIPE BREAKS if the system overpressurizes and that AHS is going to end up paying more!!!  Also the repair made VIOLATES Maryland state law to disable the safety relief valve!!!  Still no satisfaction here. The AHS folks refuse to complete the job correctly.
Note that I am a mechanical engineer, with a Professional license, know these water systems, and what happens if the spring-loaded valve is closed, played with to prevent leakages!!!
I have had such bad service over the past 2 years that I must find a better company---$760 per year and they are not doing it correctly!