American Home Shield (AHS) is a sham. The warranty only covers a very small percentage of the repair cost and the repair costs are so excessive from their network of contractors that you can get a lower cost repair, with less headache, simply by going direct to a contractor.
When you try and talk to someone at AHS, the hold time is always over 10 minutes. You can cancel but they won't issue any refund, even for payments made for future contract terms. That's where a credit card dispute comes in.
The company is an absolute sham. Very deceptive, shady business practices, zero customer service. Federal authorities need to investigate and will shut them down.