bad service

on the 2nd of December around 8 pm i went to the drive through at the mcdonald's meadowdale and bought a meal and 2 chocolate sundae , BUT i was never given my cold drink and only realised while i was on way home i check for their contact numbers on the till slip but there no where to be found , The stuff must work more and talk less so that we clients gets better service ,so basically i paid for what i didnt get ,im so sad