Dissapointed at MTN Pavilion Durban

I since upgraded my contract with MTN to SAMSUNG S9+ last year in December at Westville Pavilion and was promised that the package was going to include a free 128Gb memory card. Now its 03 April 2019 I'm still waiting for it. The customer service agent that was doing the upgrade (Lionel) with Daryl from Samsung (Samsung representative) told me they have registered my details and told me it would be couriered to where I stay. In Feb 2019 I went back to MTN Pavilion and engaged with Daryl from Samsung and he advised that he gave his e mail address and asked me to send him an e-mail stating the issue and my address and my cell number, I went home and I did that. Its very disappointing to say that from that day there was no correspondence what's so ever with this guy Daryl. I'm very disappointed and I want what was promised to me when I did the upgrade at MTN Pavilion Durban.