I want to know how to claim mission r...

You can check your mission rewards from the “Missions” section in the menu screen. To claim the rewards for completed missions, tap the claim button for the... Display Details

I want to know how to claim gifts.

By tapping the 'mail icon' at the bottom of the menu screen, you can navigate to your mailbox and receive messages there. * Up to 100 messages can be stored... Display Details