How to enter Promotion Codes correctly

You can simply enter the promotion code in your Profile -> Promotion Code tab:

Rewards will arrive in the in-game Rewards section.

All promotion codes are available for a limited time and only once.
Make sure that the promotion code you're about to use has not expired.

If you enter a referral code from another player, please note that the Referral Program is only available for new players who have not yet reached League 26!

If that player is from a higher league, you won't be able to refer them.