cancellation of gift deed done 10 year back for joint development

I entired into a Joint Venture Agreement with a landlord & hence amalgamated my land which was attached to this land. For making it a single holding we gifted a few Sq.ft. of land from each other lands. Now, the landlord has died and the legal heirs are not willing to work together & nighter they are willing to cancel the deed of gifts. We cannot move for partition as this would take years. Can you please suggest me a better & quicker way to break this holding & cancel this deed of gifts which were made for a specific purpose. The gifted land was 200sq.ft. out of Rs. 20,000 sq.ft.