Minecoins Glitched

One of my friends bought us two minecoin cards off of Amazon. My other friend who was redeeming it could only redeem the first one, the second one said that it had already been redeemed but it was new. The first card of 1720 minecoins never showed up on her account, but surprisingly, showed up on mine instead. I did not redeem the minecoins, and it doesn’t show up on my product history. I’m now stuck with a card of 1720 coins that were redeemed although it was new and we can’t redeem it, and 1720 minecoins on my account that I have no history on and that should be on my friend’s account. We both play MCPE on iOS. My gamertag is ZarathosPixel and hers is RainbowKato8174. Help?

:)