Disgusting behaviour from Steers

I have gone to this particular steers countless times, each time giving it the benefit of the doubt, hoping that it was just a bad day... I was wrong. It was not a bad day, its the terrible staff and poor management that have let me down time and time again and I've had enough. A few weeks ago I went there in a rush to grab lunch before going to fetch someone from the airport, I explained my urgency and got rudely interrupted when the teller spoke over me to her co-workers in her own language, I ended up waiting half an hour for a toasted sandwich and chips from a so called "fast food restaurant". When I eventually got my food I was called a ****** because I told her she was taking an unnecessary amount of time dawdling, having conversations and standing doing nothing while I could see my food already prepared, waiting for me. Today I went to get the exact same order plus 3 milkshakes, I had to explain the simple order about 4 times because apparently it was confusing. Just as I was about to receive my takeaways I heard the teller talking to the kitchen staff about a overweight man, that was walking outside the restaurant, in her own language assuming again that I couldn't understand her. She called him a "fat *******" and all he did was walk past the restaurant while minding his own business. This type of behaviour is appalling and disgusting, people like her cause so many issues that could so easily be avoided. I will never associate myself with another steers again because this is absolutely revolting. Something a manager should be angry about but by the looks of it this place doesn't have one since they are never there, or so I am told.