Poor service

I recently visited the cresta mall branch and received very poor service. On a normal day on a level of 1 to 10 and 10 being busy the branch was a 7. I waited with my fiance for 30mins after placing our order for the manager to come to me and say that they did not have the ingredients for my order, being a diabetic I feel it necessary that I need to eat on time and after being delayed the staff seemed less than sympathetic, I will never again go to calistos, I received better service from Mochachos.