Story time. Second bad review. If i could leave ze...

Story time. Second bad review. If i could leave zero stars i would. I haven't been back and ordered food since the last review months ago but it's directly next to my work and i have dietary restrictions so its the only place i can eat without (hopefully) being late to work.
So I ordered 2 breakfast taco on corn with potato, black beans, avacado and a coffee. When i was given the taco i politely asked if it was on corn. a girl responded with "um yeah he can read he's pretty good about following what is written. but i can go ask him if you want." what a lovely response. when i asked you if its on corn go ask. you dont need to assume and make a snarky comment. especially when i have never once had an order correct there. i responded with yeah if you wouldn't mind asking for me it's important. so she grabs my taco out of the bag with I'm sure her unwashed hands and proceeds to open my taco to look herself. as she is doing this i immediately respond with "oh i thought you were going to ask him i could have looked" it was corn.
but guess what happened when i got in my car
wrong kind of taco!
couldn't eat it because it had eggs and i know you use milk which i cannot have so i was out 4 dollars plus tip for the taco and no breakfast.
COME ON! I'm not trying to throw a pitty party but customers are real people struggling just as much as you. I dont understand why it is so hard to provide quality service. it goes a long way! this is how people get to start their morning!? great reminder to why every time i leave Austin Java i have a terrible morning.
terrible service and stuck up workers to be honest. it's not the first time one of the workers has belittled me and just make me uncomfortable. like uncomfortable enough to not go back in to have it fixed!
nothing will be done of course though all i was given last time was an apology. Would have been nice to get a refund.