Every time you complete a challenge, you’ll be able to collect the rewards for that challenge. Just visit (or refresh) the Kiko Match Madness hub page and you’ll see the button allowing you to collect!
There will also be trophies and avatars granted at the end of the event. These will be granted automatically, so check your userlookup and avatar collection to see!
Please note there might be some delay in granting your post-event rewards, so don’t be alarmed if they don’t appear right away. They’ll get to you as soon as possible!