lack of communication

I husband and I were receiving daily calls regarding my Vodacom upgrades. I finally agreed to do the upgrade and was advised that the phone would be delivered in two to three business days. we advised the lady that we were only going to be at that address until the 29th April and were assured that we would receive the devise by no later than the 28th April. We made sure that we were at home everyday to accept delivery of the devise and nothing arrived. I called the Vodacom upgrade department and was advised by the agent that there is nothing on the system. The resident of the property were we were staying for the time of the request says nobody has been there since we left. We have queried the upgrade a few times however have had no feedback on how to proceed and I am not prepared to pay for something that I have not received. I need to be advised as to the status of my upgrades.