Someone is using my account and purchased

If the only notification you got was through email, forward the message to reportphishing@apple.com as an attachment and then delete it.

Otherwise, change your password and ask the iTunes Store staff for a refund.

(159819)

What indication do you have that a purchase was made? An email? Message? An actual charge on your Bank/Credit Card Statement?

Best,

GB

Thanks a million Neil for the support earlier.