Terrible service and even worse attitude of staff

On the way home we decided to stop at the McDonald's drive through whereby we ordered chips. We were asked to wait on the side for our order. some time later there is still no food whereby we knocked on the window to get someone attention as we saw nobody anywhere. We were confronted by the lady who was downright disrespectful and blatantly rude. Sitting behind the window smiling the whole time and laughing for no apparent reason. It took around 15 minutes to receive our order.