Citibank — Lotto winner.in Germany

Hello I got a email indicated that I won €1.500.000.00. The email comes from Mr. DAVID SMITH from London Lottery and he further said the money was sent to ICICI Bank. They gave me the contacts of Marry Gordon, who alleged to be working at the bank. I emailed her, she said the money is in the Bank, but they need the T21 Affidavit for the funds to be transferred... I need to check how legit it is. If it is true where do I get the Affidavit because I'm in South Africa.

Can you kindly investigate the matter. Or it's a way on how they scam innocent people.