Last hope of starting my own business

I started a business of flight booking in January 2017 and slowly it started to build up. In the month of April 2017, we did very well but the next month the client with whom we were doing consolidation of tickets for airlines and giving us customer calls stopped giving calls and that was the time when our struggle began.

The person then also cheated us by not paying 16000$ and stopped giving calls altogether. We tried 5 people in a span of 5 months but all were cheaters and took money but did not deliver. Now i have spent more than a crore in this business and finally met a guy who is honest and helping me to set it up properly. For this I have to deposit a security of 8000$ but I have no money left.

Please help me or I lose everything in this.

Thanks