McDonald's Stoneridge Greenstone Hill

This review is for McDonald's Stoneridge, Greenstone. We ordered a nazo meal which comes standard with a coke zero. They then proceed to tell us the coke zero is out of stock. We then said okay we'll take a coke. Then we were told we must pay an extra R3.50 for the coke. We queried it and wanted an explanation as to why we must pay extra if they don't have stock of what we wanted originally. She then proceeds to call the manager, of which took too long to come speak to us. My argument is they try and get people to pay for their mistakes or shortages, why not offer an alternative straight away without extra charges!. Prevention is better than damage control! This is not the first time we've had issues with this branch. This is pathetic service!