Continued Price difference problems at builders.

I am so sick of every time I shop at Builders, having to memorize prices. Three times in a row was the price on the shelve different from the one on the Till, then I have to wait for someone to go and check, then have to retrieve the barcode, then call a manager, then argue the point, then apologies. It is simply not worth going there anymore, I don't have the time to waste there. I simply do not have to justify myself when they always have different prices displayed or items are on the wrong shelves. There are other places to shop.; I am fed-up with this ****.