The maker of the free-to-download game Smurfs' Village said the last thing they want "is to be misperceived as taking advantage of children."
Capcom, the parent company of games maker Beeline, said: "Since this issue has come to our attention we’ve added a number of features and messages to the game to help protect customers.
"If a customer purchases in-App content by accident, they may also request a refund.”
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Democrat presidential hopeful Hillary Clinton begins her New Hampshire campaign but young and female voters are opting for Bernie Sanders.
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