How does Japan ticket lottery system works?

Hi, me and my friend recently participated in a concert ticket lottery system via PIA. We are unsure how the Japan ticket lottery system works and was thinking to increase the chance of winning by submitting two applications. Today both of we received notification saying our credit cards have been charged but we're yet to receive email from PIA itself. Can either one of us cancel our tickets? Thanks.

Once you have been accepted/won by the concert lottery ticket you cannot cancel or get a refund, you have to pay for the tickets. If you don't want the tickets you can resale the tickets online like yahoo auction or some other online marketplace.

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