Hotmail account hacked


New Email
I have a Hotmail account that has been hacked and the individual is demanding money from my addressees in my address book. The Password has been changed and I am unable to log on and change it back and deny access to this individual.
Can you tell me if my Windows Live ID is the same as my Hotmail ID?
I am attempting to get a Single Use code to enable me to sign on but am currently waiting for the txt message.
Is there a phone number for the UK help desk for Hotmail or is there no such thing?