Overcharging customers

It feels like I am being ******. I wanted big Mac meal advertised R54.90. was told there's no cold drinks so I said go ahead as I don't need the cold drink only to find I was charged R69.00. I asked how is it possible that I am now paying than the advertised price where I was told I am being charged more because they do not have a cold drink. McDonald's Klerksdorp got me now for the 2nd time,will most certainly not get me a 3rd time. Just wanted to bring this to your attention if they got me they probably catch a lot of people like this. Stay away.