Mufflers repair service near Lewisville, TX

Worst Customer Service Ever! My appointment was at 5:30, and I arrived at 5:39 behind a slow customer in line. I get it, I was 9 mins late to a location that states on the door and online that it closes at 6:00. If you've tried driving anywhere on OU weekend, you know the traffic on 35 & 287. After huffing and puffing for 7 mins about how online appointments on the Corporate website should tell you that you have to be there at 5:45 at the latest, the guy gave away the policy of 15mins. I enjoyed how the news on the TV showed a time of 5:41-5:43 the entire time he was out in the shop walking around after I arrived and said I was there for an appointment. If you have a GROUPON for this franchise, STAY away , and go to one of their other locations. A "counter clerk" should have just said, sorry our policy is 9 mins late and we can't take anymore (Even if two bays are empty)... I'd be a bit upset, but not as upset as I am with Mr. Huffy Complainer. And change your sign to say closes at 5:39pm instead of 6pm, so I know.