How can I cancel an unwanted, unrequested "booking"?

Question

I was looking @ cruises of South America and was notified I was booked to an Amazon cruise (completely unwanted).

Answer 1

How are you expected to pay for this unrequested booking?  Did you provide your credit card info or your contact details?  If neither, I would ignore the notification as it was probably designed to have you contact them.  

If you did give them a means of charging you for the booking, I would suggest that you notify them by phone followed by a registered letter confirming your error and cancellation.  Save your receipt as evidence for the credit card company.

Answer 2

If you didn't give any credit card information or other payment method, don't do anything.

Answer 3

Send them a letter, describing the problem and threaten legal action if they do not remove you from the list.  Next time, don't give your name out unless you are actually trying to buy or reserve something.