DSTV Catch-up

Firstly, I am disappointed there is no email address for customer queries. I am not prepared to spend money on waiting for a call centre operator to become available. However, my understanding of using downloads in Catch-Up was so that I could 'store' the remainder of a series before it expired. this does not seem to be the case as I downloaded a dozen episodes of Masterchef Australia as I would not be able to watch them before the expiry date shown. It would seem I've wasted several GB of expensive 3G data download.