I'm pretty unhappy with my latest experience with ...

I'm pretty unhappy with my latest experience with the service department. I took my car in on August 18th for an appointment to get an unusual overheating issue diagnosed and to change my oil. I was called on the 21st of August and told that my engine heads were warped. How does that even happen when you are barely driving due to COVID?? I take excellent care of my car. All service has been kept up on it. Anyway, I was promised my car would be ready by August 28th or 29th. Didn't get my car back. I was told the heads had to be sent out to be machined. My car would be ready by the 4th or 5th of September. Then I was told the machine shop was behind so now I wouldn't get my car until the 11th or 12th of September. Well, I still don't have my car. Today is September 16/day 29. I've been told I'll get my car this week. I'm not sure what to believe.