Sonic Drive-In review: They don't pay attention to what I order I'm allergic to cheese and I keep asking for no cheese but continue to get cheese

I'm allergic cheese I can get really sick they continue to put cheese after I tell them time and time again no cheese this is happened about 5 times in the last month do I just stop going to sonic, I love sonic but not enough to get really sick I have called them to complain every single time they just apologize and ask me to bring the food back to exchange but either I'm already home and I live 20 min away or I'm at work doing a 16 hour shift one time they told me to take my receipt and they will give me my burger ok so I did that and what do you know the same way I don't want to never go to sonic I love sonic but I can get really sick if I eat cheese I order on line now to insure I put my order in right and still I always get cheese I think after about 5 or 6 times that it's happend to me in over a few weeks I think I either deserve my full order for free or just give me a refund on my last purchase Wich is on line my email is [protected]@gmail.com Thank you for your time and I hope I get some kind of help for all the trouble its caused me it's hard working 16 hours without eating and I can see if it just happened once or even twice people make mistakes but every single time I order it happens and it's not just that I don't like cheese I'm allergic to it and I can get really sick so please help make it right because I love sonic