Duplicate share certificate

I had lost 250 shares of SBI which were forged by someone. I immediately reported to the company and followed the procedure for issue of duplicate shares.
But as the shares were purchased by some other buyer, SBI dint issue me the Duplicate Share certificate because the buyer has filed an appeal against the company (SBI).
 Can anyone tell me the law regarding the situation, the section, any decided case law and what procedure shall be followed by me on order to get the shares back?
 

Thanks