Delay in order process

I pre-registered for the Samsung S7 edge on the website - which was available much later than other service providers. Now I'm told that the processing of my upgrade will only happen when the phones are released in SA which is available on 11 March 2016. So when will we get the phone? It was much more efficient when I had preregistered for the Samsung S5 and I got it the day before it was supposed to be released. This has not been the experience with this promotion and I'm very disappointed.