How can someone become my guarantor?

My name is Anand residence of Nippani pin 591237. Respected sir, I was the investor of PINOMIC VENTURES LLP.PVT LTD SANGLI. They use to give returns on trading for two to three years and they earned public faith. They also gave rereferral income. I referred some body and I gave my cheque for security. they invested amount .they get 60%amount return, but unfortunately company collapsed , payment stopped. Now they bounced cheque by the name of third person. Who is not related to me and filed case. who I defend my self .plz reply.