Stone Ridge Car Wash

The Stone Ridge car wash offered a "buy 10 car washes, get 1 free" promotion. Apparently they have since stopped this promotion. However, I had been paying for car washes up through May 2014 and they continued to punch my ticket. When I hit my 10th paid car wash, they refused to honor my free car wash and said they stopped the promotion "last year". I have been using this gas station and car wash exclusively since February 2012. I tip their car wash attendants every time I use the car wash. They have lost a loyal, generous customer for life over a simple case of terrible customer service. If you stop a promotion, that's fine. But you should honor the last remaining free car wash coupons until they are gone.