Units you receive as a Reward for Missions and Tournaments are sent directly to your Base. This happens as soon as the Reward is claimed. Remember to check your Battle Reports: there is a chance you might have been attacked and already lost the Units you received. Go to the Aid Center to revive them.
If that is not the case - and you still cannot find your Units at your Base - restart the game and try again.
If this does not resolve the issue, please contact the Support Team.