Purchased Sett before i even got to the calling card

I was super excited to get my hands on Sett, so i purchased him the second i got on League. However, i did not know that the Calling Card gave you Sett for free.... Now i have the Calling Card in my inventory, and it wont open... So did i just waste 7800 BE on an otherwise free champ and get an unopenalble Chest in my loot, or will i somehow get the BE back?
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