The staff at this restaurant are extremely rude. I explained that due to an allergy, I was not able to have a particular ingredient and asked if they would be able to check their chicken and beef for it. There was a bit of a language barrier, so after a few seconds, I asked if their meat was bought fresh or processed. She was still not understanding, so I asked where it was bought from. She rudely responded "why you asking?". She became so snarky and rude and I continue to try to explain.A cook from the back came up front; he was equally unhelpful and rude. They continued to talk in their language (so I couldn't understand), making me have that uncomfortable feeling where I could tell they were talking about me. It's not unreasonable to expect a restaurant to check for an ingredient. Needless to say, customer service was horrible; they obviously aren't looking for customers! And sadly I left without the sub I wanted and ended up going to another restaurant.