The server didn't bother to write down my order, ...

The server didn't bother to write down my order, and then brought out my food with the wrong bun. Then did the old switch the bun in the back trick. I know lamb is not cheap but that's such a gross way of doing business when someone has an allergy. I'm most disappointed because that lovely lamb burger was no good and went right through my husband and I. Very disappointed and grossed out. Stick to beer.