Arby's  -  mold on food

I ordered a Roast Beef with cheddar From the Little Rock off Shackelford location and found the roast beef to be molded and discolored in many areas of the sandwich. After taking three or four bites i noticed a blueish purple color on the edge of the meat, I took the top bun off to see several places on the meat were molded and discolored. Im am very dissappointed in this because Arbys has served hundreds of people this same food, and as trusted restraunt the food served should be checked and double checked. My husband is going to contact a Food PoisonClinic and have the meat tested and analized, I hope that no one has become ill due the the neglagence on the staffs part.