No stock and can't check availbility

My wife's phone is due for upgrade and she wants the Gold Samsung S6 64GB Smart M package with an additional gigabyte of data. We physically went to 2 Vodacom branches in Sandton and then Rosebank and they did not have stock after calling before and confirming that they did. The Nelson Mandela branch promised us they would receive the phone today but obviously they got the order wrong. It is infuriating and annoying that they cannot keep their promises and they cannot check which branches in Johannesburg have the phone available as their excuse is that it is a franchise. I find this absurd - I am dealing with the company Vodacom and they can't tell me where I can get a phone from - that service is pathetic. I can't wait for this contract to expire - they don't deserve our business.