You shut down your console while still in queue? This was the mistake. Your search queue doesn’t immediately end when you disconnect, shut down, etc. from the game without properly cancelling and shutting down. Until it times out (which can take up to 45 seconds) you can still be paired for a match. Even if you hit the cancel search button, wait at least 10 seconds before shutting down the console. This will ensure you did not get paired for a match in the moments of you pressing “Cancel Search”.
Unfortunately there is no way to reverse penalties.