If you didn't get the item you had your heart set on in a pack, you can try to trade for it! From the Trading tab, you can view any active trades, items other collectors are trading away or looking for, and you can post items you'd like to trade away. If you are looking for a specific item, from the Shop view you can create a post to request a trade for it by tapping on the item>the 3 dots>trade. You can also instigate a trade with a friend by hitting the + at the top right of the Trading screen. Add and offer items and make your offer. Chat with the other collector during a trade with the message button at the top center between your profile pics.