Vodacom don't care attitude

I have been trying to take out a contract for over two months both instore and online. Have been through the entire process four times now (instore and online), on two occasions I have been approved and then told that there are no handsets available (iphones). When the handsets do become available the contract terms have miraculously changed and I have to sign up to a more expensive contract. On my last attempt I was told that I do not qualify for the smart XL R799 package but do qualify for the smart L R749 package, despite there only being a R50 difference in the packages, although the smart L has 150 fewer minutes and 300mb less data so is much poorer value for money. I'm told it is because my credit rating is not good enough, despite earning a 7 figure salary and having no debt aside from a mortgage on a house I own. When I query this or try to escalate the matter I am informed that their systems are down and they will call me back (happened twice now), which then starts the entire process again. <br> I am pretty much at my wits end and Vodacom clearly do not seem interested in assisting me particularly as they know they are the best of a bad bunch