3 Weeks and I still don't have a phone or feedback

I went to MTN Mokopane on the 4th of May to find out about what I need to open a new contract for the Samsung S6 and if they had it in stock. I made it clear to her that I need the phone urgently because that would be my last week in Mokopane. The lady assured me that if they don't have it in stock they would be able to get it within that week. The next day I went back with all my documents to open the account. I asked her when I would be able to get my phone and she said that if the other customer doesn't come and claim her phone, she will phone me and give me that phone. She never phoned me and I had to go back there on Thursday to ask her about the status of my phone. Then she told me they deliver on Mondays, Wednesdays and Fridays. So I would be able to get it on either of those days. I went back to the store everyday thereafter and all that she had to say was that they hadn't deliver the phones yet. As I sit here today, I still didn't get feedback from her and I am still without a phone after three weeks!!! This is totally unacceptable. If they weren't able to help me, she should have just said so.