Steps that you should take if your purchase hasn’t passed in AppStore:

  1. Open Monosnap.
  2. Go to Preferences > Account and choose any paid service.
  3. Click one more time on the button Buy.

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Don’t be afraid, you purchase isn’t written off for the second time. Purchase commit once and for all. In this way, Apple determines that your purchase was made. After you will be offered to repeat the process of buying, but not charged.