Help me to start my business again

Karunathi, Sri Lanka

I was a owner of a computer shop one year before. One of my friend told me that there is an opportunity to invest money and take a high interest, so I invested 50,000$ to take it back in year with 15% interest. After 2 month the broker has disappeared without informing. After that I was totally lost. I was not able to keep my business running. I sold my car. Now I'm repairing computers from home. But it is too less income. Please help me to start my business again. Thank you