Dear Client, You can file criminal complaint through court against relative and Rowdy, u/s 420, 467, 468, 471, 102b IPC. That relative conspired with the rowdy and sublease/sold your property to him even when court declined his title in the property. Criminal trespass, cheating, forgery, criminal conspiracy. And, once execution is order, court official will go to recover possession of property with the aid of local police which cannot be postponed. Press on execution petition.