You could get together with other shareholders and victims of Pawan Karki, raise money to hire a competent lawyer in the US who is fluent in international finance law and file a suit.

Many have complained here in Sajha about Karki and called him names and such, but Karki is as is.  So, unless anything substantial and consequential is done legally, Karki will continue thumbing your and other victims' nose down.  Sorry, but that is the bitter truth.