Not getting what you pay for

So, after 2 weeks of struggling to take out a new 50gig LTE A contract with Huawei modem, I finally managed to stand in the queue for 45mins at the closest store. My online order was never received although I received a confirmation email. But anyway, I am just sooooo hard up to get the modem and data. At the store as I was about to leave I realised that the modem I received is the previous model (B593) which I already have. The deal in the booklet indicates you receive a Huawei E5186 which is a LTE A router. The lady who helped me just said that they don't have stock and that I should take the B596 because the price is the same. That is unacceptable. Its like taking out a contract for a Galaxy S6 and receiving a Galaxy S4 because they dont have stock. How many dumb people before me received the wrong router? Now she tells me that she has no idea when they will get stock. She will phone me, yeah right . I please just want a router and data! I am begging for your service and I am even willing to pay!! :-) Please let me know where the routers are in stock in the JHB area. I will go and collect it myself. Please just help me. I don't want an apology or excuses, I just want the router.