My experience this past weekend at the service cen...

My experience this past weekend at the service center was terrible. Moe was the service agent/mechanic doing the oil change on my car and he was so confrontational and threatening. It was so uncomfortable because he refused to let you reason with him or even have a conversation. I felt so embarrassed because he yelled and treated me as though I committed a crime. All I did was explain to him that I have been bring my car for an oil change for 3 years now and no agent has ever told me to bring a coupon. He yelled at me for something that is not my fault. Why yell when you can speak to me and explain the reason for the coupon?