Whataburger

Greetings, First of all I would to express that the day of my Whataburger visit was my birthday (08/05) and all I wanted was a Whataburger sandwich. My order was a Spicy Chicken Sandwich with no mayo, no lettuce, no tomato and I added extra Buffalo Sauce for.50 cents. * What I received was extra Mayo with No Buffalo Sauce, so I took the sandwich back in to inform them of the mistake and they wiped the Mayo off with a napkin with that same patty which was still coated in Mayo, then they added the buffalo sauce on top. Now my question is, what if I am allergic to mayo or products that contain egg products? Then the employees were horse playing around and on their cell phones while customers were waiting to be served and waiting on their orders. This is so unprofessional and unacceptable.