Worse service

Worse experience with Mc Donald's in sunward park boksburg the staff were very rude to an extent that my order was incomplete, Yesterday I ordered four items one which was a Caramel sundae, my Sunday came not full not even half a quarter, I advised the staff they took away to fill up and requested that they add the caramel on top the staff response was what more do I want as they have filled my cup. Never going back to this Mc Donald's.