cheating on prices

I was looking too buy a pair of all star trainers , when I tool a box off the shelf too try them on the box had R699,00 which I think is a high price for these shoes already, never the less , I said too the sales guy in the shop that I would take the pair I tried on, I asked the him if they were on special because the price had been not covered well with a marker pen, his response was no they have been marked up! !!! Too R749,00 !!! So now I started questioning it as I could see the correct price on the box of which I do have a photo, on the box it tells you when the items were brought in and the ones I tried were last summer stock , so they bought them at a lower price than what they would have bought them this year , but they now charging this year's prices , they are cheats and *******s , please people be carefully where you buy your goods