Reliance saved us when my elderly mother's furnace gave out on New Years Eve. They were the only service available and they did eventually come and replace the furnace over the holiday. She purchased a package with AC.
BUT once they had the contract the trouble started. That AC was never installed. I have booked several appointments. Visited over the long weekend in a heat wave - no AC. House is 29C! Came back to town and gave up my Canada Day plans to wait for the promised install. No one ever came. I was promised a manager would call me. They never did. When I called back they offered an appointment in a few days... Now we have a health crisis on our hands.
This has been extremely difficult, given that I live out of town and this service has not followed through on its promises.