How you should be resetting your shop (requires dual client/shops) if you think someone camping underneath it. i know it sucks to have to resort to this technique just to reset your shop but you gotta do what you gotta do (rightclick copy url and paste into new tab if it doesn't play or bad quality) i was a tiny bit slow in the video but i'm sure you can practice and get it down to even a few milliseconds. human reactions are like 100ms at best if the person still takes your spot, then by gosh it'd be hard to convince me that they're not macroing
if it's a permit shop, you hit esc to close the permit shop down if it's a hired merchant shop, you need to click close shop first, which bring up a confirmation window to close shop, then you hit enter to close it
Due to I had experienced bad incident few days ago, thanks for showing this method. Thanks for letting me know this post @yaqzan too. (His comment got deleted because someone thought his post is irrelevant . But he helped me.)