Arthur made a post in the forum about the discounts before the game was released (the forum search function is very handy

), and provided this information to people who had bought VV1 and were asking about discounts:
we will do our best to extend discounts to anyone at all who bought it (and can show some kind of email receipt). This will likely be for the period immediately following release, maybe a couple weeks or so
Since the game was released almost 3 months ago, I would suspect that the discount offer has expired. However, only Arthur and Carla can say for sure.
If you didn't receive a response from your email to LDW, it probably got caught in a spam or junk filter. Carla answers all support requests, but many email providers block email from ldw.com.