Rumble rewards are sent to player mailboxes about 1 hour after the event ends. If the event has just ended, please wait a bit and check your mailbox for your rewards.
If it has been longer than an hour or other members of your guild have said they received their rewards, you may not have met the individual requirements for rewards. You can check your Personal Points total in-game by going to the Rumble island, tap on the scores icon in the bottom right, and navigate to the Points tab. Look for your name, and the number next to it is the total points you contributed to the Guild Rumble.
Rewards are based on Tiers. Your guild's rank determines which Tier rewards everyone will receive. However, each player must meet the minimum requirement in order to receive the rewards for the Guild. This is intended to encourage players to participate in order to get rewards, rather than leave other members of the Guild to do all the work.
A full list of the rewards and the point requirements is outlined below.
If you reached the minimum point requirement but still don't have the reward message after an hour, please contact support. They will check on what went wrong and be sure to send you a correction if needed.