Poor service

I went through to Vodacom Fourways to do my contract upgrade last Monday after really pathetic service and almost 2 hours in store I had decided on the S6 edge. I was promised a free gold cover as this only exclusive to Vodacom or something like that. I was told that they did not have stock and that they have ordered and it should arrive the next day and I will be called and notified. It has now been 10 days and after calling in almost everyday and been told there is no stock and getting attitude from the staff. I have also not once been called. I have decided to use this platform. I was even told by one of the women that this is a store you buy things you shouldn't be wanting anything for free... I spend almost R2000 a month in my household with Vodacom and deserve a little more respect than that.