Upgrade was doen but no one can track it

I did a upgrade on my contract on the 04/04/2016 after i have try to upgrade since the morning 8 at 4 a clock one of the agents was able to help me with the upgrade and said that my phone will be delivered in 2-7days. yesterday i phone again to follow up on the progress, then the agents said they are not able to help me because i was upgraded on the new system and she still have the old system so she transfer me to a other agent so i was transfer between like 6 or 7 agents then finally the last agents said she will help me, and ask for my order number, But apparently the order number i received from vodacom via sms is wrong it should start with a u number, but i received a Quot number *** and a order number *** so she could not track it and said she will transfer me again so i told her that this would be the 8 person she will transfer me to, so she said ok she will phone upgrades her self and hear what they are saying, after holding like 15min she came back to me and said the upgrade was done, but i will only recieve my Pfone end of MAy as the with the new system you dont get your new befor your old contract date has ended, so why the upgrade?