Misinformed by IStore and am paying a painful price

I went to ask for a quote for a series 4 watch and was given a quote to submit for a new watch, I was given a quote for an iwatch S4 without being advised that the model was being discontinued within a week and when i go back with the quote within 7 days I am advised that the watch has been discontinued and can't be found anywhere in SA. now am stuck without a watch and expected to pay twice the price I was quoted on within seven days ago.