So what about directing your complaints at the people who are responsible for your predicament, not the customers who reasonably think that a shop that is open for business wants their custom? And who maybe don't have a choice about when they shop?
Because those kinds of comments can and do lead to being "managed out".
But OP wasn't lingering. She wanted to pay. It would probably have been quicker to put her purchase through the till than to spend time explaining to her that the tills had closed.
No, it wouldn't, if the tills were inoperable.
What is it with some customers and being told no?
Does it occur to you that customer may have to shop near to closing time for all sorts of reasons, not just because they're all selfish entitled wankers?
I work in a department store. There is literally nothing, not one single product that we sell, that could be considered an emergency. So, while I thank you for your anecdata, no one ever died for the want of a Merino wool jumper, and no one ever died for the want of a Laura Ashley picture.
You rightly point out that getting another job isn't easy. It will be even less easy if more shops go out of business for treating their customers as a nuisance.
If you're there at the right time, then actually, I don't treat you as a nuisance. If you're there on/after closing, expecting me to wait while you meander around, then all bets are off.
But I think we'll be okay. For every person who treats me like dirt, or like I don't matter, there are at least twenty who are neutral, and another few who are actually super nice, good for the banter, and funny to boot - and they leave on time. So I'm good, thanks, with the customers who treat me well, even if the nuisances flounce. I think we'll be okay.