What do you mean by earlier this year??

You were not supposed to receive a $50 gift card. You received 8,000 points, which you could exchange for a $50 gift card, if you chose. If it was during the current promotion, which started May 12, then you can still exchange those 8,000 for a $50 gift card. If it was for a previous promotion, then it is to late to make the exchange.

Either way, you still have the 8,000 points.