Confirming cancellation [duplicate]

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We have recurring donations that are able to be "cancelled" (meaning to cease its continued billing, not delete it from the interface). There is a button on our interface called "Cancel". When they hit the button, they get this dialog:

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One of our users reported this to us:

I inadvertently canceled a gift. The popup had 2 choices: Cancel or Close. I thought Cancel meant cancel this operation - a little ambiguous.

What options/wording would be less ambiguous and more clear to the user?