Hi jaydipal,
I would suggest you to contact IDP for that, they would charge you Rs 1700 or 1800 for that(I can guess u from India from ur name)
Just send them an e-mail on info.india @ idp.com or call on +91 124 4411 888
Ru planing to apply for another country as well...? I mean why u need IELTS General Certificate?