Rotten mounding burger bun

I order McDonalds blackhealth Randburg, from Mr Delivery on 25/01/2018. When I opened the Happy Meal I saw that there was a white disgusting mould infested bun and the burger smelt off! I am so disgusted and disapppointed with this because food is expensive! McDonalds is expensive and to find that the food was old! It was unappetizing to say the least! I will never order McDonalds again, and I will make sure no one orders from that I know from McDonalds!! I’m very angry and upset that i wasted my money !!!!!!!!!!!!!!!