I Need Help !

Recently I Received this Message From Unknown Hacker .

" fullname: The Hacker
  email: zmkpexjf@clrmail.com
  message: Hello , I have a bitcoin faucet script that i can use to hack your website anytime i want to, but if you will pay me 0.05 bitcoins to this address 1Nfff9b6Ao9W5HpcCUz5h8oPPfxRGSDrw i will not hack your website anymore and leave you alone. If you decide to not cooperate and follow my demands i will make you regret your choices later.

Failure to reply to this email in 48 hours will have serious consequences.

 User's IP Address: 46.165.197.1 ( Maybe This is VPN ) .

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Please Help me , How to Block this Hacker ?

Thanks in Advance .