Hi Robert. I imagine others have already responded and their messages just haven't been reviewed and posted yet - but just in case:
In the lower left hand corner of your screen, just to the right of your red life bubble, you will see an icon of a gift package (red package, white ribbon); click on that icon and you should find the monolith inside. Many players have multiple pirates on a single account, so KI assigns the gift to an account, not an individual pirate. If you activate one of the pre-paid gift cards or bundle cards, any pets, companions, houses, outfits etc will also be placed in the red gift box until one of your pirates on the account takes them out.