Whataburger review: Horrible customer service

On April 20, 2021 I paid with my credit card outside. I used a coupon for a free burger with the purchase of a meal. I got my order but was missing the free burger. I told them and they told me to drive forward so I did. The female manager don't know her name because I didn't pay attention but I should have because she had a nasty attitude. She came out with an attitude saying that all the burgers were in the bag I showed her the two burgers and she demanded the whole bag back because she thought I was lying and she said she had to check for herself. Never going back to that Whataburger in Alamo, TX. My ticket number 1531301