Selling stock you dont have

Just a word of caution. MTN offering iPhone 16's. Complete the upgrade docs and submit, get approved and then get told we will let you know when we have stock is prosperous - if you selling something surely have the stock. after 3 weeks I walked into a Vodashop in Hyde Park, asked for a phone, did the paperwork and left with the phone. MTN - up your game as not fair on a client to complete docs and then get told, WHEN we get stock - NOT CRICKET