Problems with American Home Shield

I have serious concerns about using American Home Shield. We had a problem with our HVAC system that, after a month, has not been fixed. In that time, (1) I was told that the unit is working normally in spite of the fact that it is frozen over and does not work at all, (2) One of the their vendors tried to shake me down on buying a replacement unit -  to replace the one that they reported to AHS as working, (3) AHS then sent me a quote on a new system that they make money and at the same time, they were telling me that my current system works. My view is that they have institutionalized wearing down their customers and trying to squeeze more money out of them rather then performing the service they are supposed to provide. My experience with them is that their vendors are not very good and simply do not care. I have had electricians from AHS that have misdiagnosed a broken light switch as a home wiring issue that would need $1000s to repair. I had a plumber 2 month ago profess to not knowing how to replace a drain stopper. I would strongly recommend that AARP revisit using their as a vendor to its constituents. AHS preys on its own customers. Just horrible.