McCarthy Chevrolet of Overland Park

Used an oil change coupon sent to me by the dealer. When given at check in, it seemed like less concern was evident. When I returned over 3 hours later I was told they "Honored", my coupon. What the heck does that mean!?! Did you do me a favor to accept your own advertising!!?!? In addition the multi-point inspection?? Were the fluids low and topped off?? Not a word or note just basically here's your bill and BYE! No mileage/date tag in the window for next visit! Basically they may have slapped a new filter in and topped off the oil for all I know. I have not been thrilled with this place basically because when you arrive you have to look for someone to help you. Usually planted in a chair inside rather than watching for customers and providing expected service and acknowledgement. Could it be I wasn't in a 50000$ vehicle? just a 2010 impala? Wont go there again and would not recommend. It was not my first bad service experience there.