I bought a shawarma ...

I bought a shawarma wrap there l, when I got to work and took the wrap out of the plastic, the ingredients literally came out of the wrap and fell on my pants.. I told the guy what happened and he was busy making excuses and literally told me that he will not apologize... I spoke to the owner and the owner said he will speak to him but that does not help in anyway as it is not the first bad customer service experience they have provided.. Previously I witnessed the same guy almost pulling a gun out on a customer because of an argument they were having..