Black Friday MTN Samsung J5 pro special

Since I was due an upgrade, I recently went to our local MTN store to find out about some options. I had previously owned a Sony, but opted for the Samsung J5 pro as it was on special - specifically came along with an SD card. I was informed that I would have to go on to the Samsung rewards app to redeem the SD card. When I managed to get on to the app I saw that only the scoop speaker was available and not the SD card. I made contact with Samsung and was advised to email the Rewards team. I did so, twice, and have heard nothing back. Subsequently I have been back to the MTN shop where I made the purchase to enquire how to proceed. After having been back and forth, on multiple occasions, with promises that they would contact their Samsung rep and then I would be contacted directly, I am yet to hear anything. Other than being supremely irritated I am disappointed with the service and lack of commitment from Samsung (and MTN). Makes me wonder if I should have rather stayed with Sony (and perhaps have changed my cellular supplier).