This happens every time great plates and treasure of the sages come together in one week. At least one person who doesn't even paying attention. If you don't understand English, you could have at least bought one key to test which is for what event.....
You are most likely not going to get back your coupons due to human error because you did not pay attention.
Correct
Unfortunately, we can't provide refunds on non-bug related mistakes ingame.
Please be aware the next time.
Thank you!
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