No stock and bad service

Hi, I have been phoning store after store, some not picking up(four ways,cresta, clear water mall) looking for a Samsung galaxy s6 edge, no one has stock and it seems no one can tell me which branch has stock for me to call and reserve, not even mtn direct can give me an answer or has stock??? I don't care what color the phone is I just need to find somewhere I can get one on a contract....its amazing that a telecommunications provider as large as mtn has a retail sector blind as a bat and no one can see stock availability... I can even tell you where stock is in my company and I have 19 branches across South Africa..PLEASE can someone get back to me with an answer..