Misleading advertising

On the 8th of February after doing my research I decided to upgrade on the Epic 100 16gig iPhone for R459 when I went to blue route branch (they had it advertised in the store at the time I was there) after filling in all the paper work they told me it was now R699 and there was nothing they could do!<br> I then went to istore canal walk as they were still advertising it at R459 they told me not a problem but they didn't have the colour i wanted and that I could wait so two days later they called me to say they only had the sliver but now it was R599?? I have emailed cell c and got response today almost two weeks later saying that istore can no longer offer that deal. I have taken pictures of what was advertised in both stores. I am. Completely in shock of the lack of service and the way they have handeled things!! They are now more expensive than any other network for the iPhone! I have been a loyal cell c supporter for years but I am now looking at changing networks as this has left such a bad taste in my mouth!