Incorrect order

Went to Mcdonalds drive thru, while being extremly busy driving around doing erands, popped by the drive thru, went straight home, when i got home i saw i was given chilli cheese fries instead of chilli cheese double, i refused to eat it as its not what i ordered, luckily i didnt stay too far away, i drove back to get it changed, there excuse was the lady was new, not my problem, i cant be inconvenienced because she cant read correctly, this was the on at chilli on top Sunninghill