2008 H1B not stamped can i go for exempt category?

Hi,I got H1B in 2008 with validity 10/1/2008 to 09/19/2011.But i never stamped it till now. It crossed 6 years alreadyCan i make use of my H1B Petition to stamp under exempt category now. Some consultancies saying They can file successfully. Can i Believe them?Please advice me.

Can i make use of my H1B Petition to stamp under exempt category now. Some consultancies saying They can file successfully. Can i Believe them?

Technically, yes, your H1b can be filed under non CAP.