You are missing the fact that they are vanity sizing. So if a true 32 buys them and they are really a 37 then they won’t fit.
Did you state they were 32” or that they were labelled as 32.
Id probably feel that your description wasn’t representative of the goods other wise. A bit like if I’d bought size 10 shoes, and although yours said 10 on them they were only a size 7, I’d be sending them back.