How can an upgrade take 4 weeks?!

On 30 March I upgraded on one of my cell phone contracts through Elite Mobile, where I was offered a 3 gig data with no device. But on 1 April I upgraded on two other phones where I was offered Samsung A3 phones with Flexi 150 contract, at which stage I requested that the other upgrade should be changed to be the same as the other 2. When I followed up a week later, I was told the delivery has been cancelled due to duplicate order. Furthermore the wrong order was cancelled and after almost a month I am still waiting for the problem to be resolved. This is utterly ridiculous and unacceptable. Elite Mobile is blaming Vodacom for the delay. I don't care who is responsible for the delay, I want the problem solved and no more excuses.