Guide me in the following Case?
My neighbor has purchased a house site in the year 1994. I have also purchased a house site from the same vendor in the year 2002 with a right over 16 ft widdth joint passage in between our sites. This right is clearly mentioned in my document. The vendor is the one and the same. My neighbour, in the year 2005 registered a rectification document from the same vendor as if the 8 ft widdth of the joint passage was sold in the year 2002., and sold out the remaining 8 ft widdth passage as if I do not require the joint passage. This was happened with out my knowledge. Now my neighbour has encroached the entire 16 ft joint passage and making constructions. Do I have no right over the joint passage? What is my legal possession ?