Thank you for taking care of my car

this service was complimentary due to a prior service issue. I gave the gentleman that checked us in, the postcard we had received telling us we had a complimentary oil change, when I gave him my keys. when I went to pick my car up the card was no where to be found. I was given the service complimentary but was a little embarrassed to have to explain the situation. Other than that, the service was great and thank you for taking care of my car. Jeri