Raw burger patties on and order of 20 burgers

We purchased food for guests to break their fast on Wed 8th May. Based on previous experience, the burger patty was raw. A specific request was made a few times when placing the order and stressing the fact that the patties must be well done. To our horror, when the guests ate most of the patties were in fact pinkish red in the middle, this was extremely embarrassing and completely unacceptable especially with the stressed upon special request. An order of 20 burgers and Steers does not value their customers enough to provide food as requested by their customers and instead provides raw food. I want this sorted immediately and will never buy from your store in future!!!