Drive through becoming a walk through!

I work down the road from the KFC in Woodmead, Needless to say, that's where I get lunch most days. There hasn't been a single time that I have not been asked to park on the side and wait. every time I did that before, I was forgotten about, and there were other cars after me, who collected their food and left. Now I started saying to them that I will wait, as I am in a hurry, and I get almost chased to the stop sign saying I should wait on the side, im sure this has to do with their target service delivery from the drive through window.(time the order is placed to delivery) which means that their stats are not actually correct, as they are making a lot of clients park on the side and wait for their order, they should have collected at the drive through window. the attitidues of the staff behind these windows are appauling! i wont be going back there again.... its been going on for too long now, and to eliminate frustrating myself... ill rather stay away