I BORROWED MONEY FROM MY RICH BROTHER BUT THE SCAMMER ON THE INTERNET DID A FRAUD.. DO I PAY BACK AS IT WAS A FRAUD?

I lost money and filed a fraud case as I was scammed on a website. The money is so much that I am worried I cannot payback brother it will take me 7 years. My brother is rich but he wants the money, I have lost nearly all my wealth and live on 2 pounds per day after paying all the necessary bills.