Upgrade of contract

on 2 October 2017 i was contacted via telephone to upgrade my contract, the next day i received my contract on my e-mail address. Up to date I have not received my device which they said they will deliver at my work. I have called numerous times and i have sent an email to escalations and direct sales. I am very disappointed as it seems like nobody care, i am already paying my new account without a device, shame on you. i want this resolved please!!!!!