Not a size 9

We all know sizes differ from supplier to supplier. Well I'm used to wearing a size 9 Nike. Have been for a while now. I purchased a size9 Nike and because I'm used to the size a wore it to a game. Had it on for 10 minutes and hurt my feet badly. I'm trying to explain that for you to advertise that as a size 9 and all the other size 9's fits me perfectly means that this can not be a real size 9. Or is this the only size 9 from all the others that do not fit me. I know I had it on, but I truly believe this is a defect from the supplier side.