Information about the current score event and how to earn score points can be found here http://www.aeriagames.com/forums/en/viewtopic.php?t=1674213
Please not that score events are limited time events held by CoG from time to time and points can only be gained by carrying out specific tasks in-game as required in the event description. Each score event differs from the next.
Score shop can be found in the exchange shop next to the honor shop. The items in score shop are adjusted for every score event.