McDonald's Welkom ****py Service

Last night I went to McDonald's at Welkom in the Free State. I am extremely appalled at the horrible service I was subjected to. I ordered a nazo meal and the cashier said that they dont sell those. After I opted for a big mac, I had to wait for a very long time and people who ordered after me received their orders before me. I had to go and ask for my order, only after about 10 minutes they gave me my order and then took my receipt. How is it that other McDonald's are selling nazo meals but this particular McDonald doesn't sell them? Also, they were very rude.