I bought and used over 600 rubies during the water dragon mystery chest event but did not receive any mystery chest. We were told for every 200 rubies we use we get 1 chest. I used 600 and haven't received anything.

What else do I have to do to receive them? I only made the purchases, stricly to get the chests.

My IG name: RokkaMan
Realm: Sapphire