Proof of purchase an issue

I upgraded my phone on the 24 November 2017. With the phone comes a free TV which needs to be redeemed from the manufacturer. To do this I need a proof of purchase of the phone. However Vodacom cannot seem to get this. The call centre agents send me from one person to the next without even telling me. I just wait on the phone and then someone new answers who then just puts me on hold. Pathetic service. How must I get my free gift when Vodacom employees do not even understand what I am asking for????