Sarcastic and Arrogant

I was in Centurey City on lunch AROUND 13:00 I waited 15 - 20 min for an order when all that had bough after me were recieving there order I then encquired from a gentleman called Keagan to find out where my order was who rep**** very rudely very rudely that I should ask him but the other tellers. I then waited another 10 min and eventually called the manager who was Rowena. She arrived I told her the incident and advised I would like an apology. She called Keagan who was relunctant in coming and when eventually did LAUGHED IN MY FACE and sarcasyically said Sorry! I am very upset and did not even enjoy my meal. WORST SERVICE EVER