Not being allowed to pay price items are advertised with &

I ordered items that were on special from the spar2U app from Queenswood spar , and within minutes my order was canceled because the pricing on the app was wrong.. according to my knowledge the price I see is the price I pay.. when I called i was sent from post to piler from Spar2U , to spar queenswood and back to tops queenswood . where I spoke to someone who said that there is nothing he can do about it I should wait 14 days for a refund. and I am not happy about it at all cause it didnt take me 14 days to order, it didn't take them 14 days to cancel my order . I just want what I ordered at the price that it was advertised