Bad service

I cannot understand why McDonald’s Roodepoort always have an issue with Hot Chocolate It is on there menu but when you order it via Uber eats (when you pay upfront) they are always have a shortage of certain ingredients. Yesterday they where short of milk Gosh Checkers is next to you You charge R40 for a hot chocolate surely you can afford to buy milk at checkers They charged me but did not deliver the hot chocolate