Which document is correct ????

In 1982 s.mallamma given a GPA to her grand son s.Rajeshwar rao. In 1989 court decree between Mohamad hashim and S.rajeshwar rao( GPA holder) decreed total 0.8 guntas (38 &39 - 0.4 guntas , 77 & 78 - 0.4 guntas ). In the year 1999 s. mallamma was died. In the year 2002 mohamad hashim also died. after die hashim, hashim son(fazal ahmed) was not registered land his name(fazal ahmed) till 2003. in this time s,rajeshwar rao (GPA holder) see to sale one of the bit 0.4 guntas (77 & 78) to another person R.Govardan to registered in the year 2003. After long time in the year of 2008 hashim family (5) members appoint to fazal ahmed(one of the family member )has a GPA holder for total 0.8 guntas (38 &39 - 0.4 guntas , 77 & 78 - 0.4 guntas ) as per court decree. after this in the year of 2009 i am bhasker purchased a land form fazal ahmed registered in the year 2009. in the year jan 2012 i am started construction in the year 2012. in the year 2013 R Govadhan was come and they said this land belongs to me so u r illegal occupied. i am strated check the land details from the beginning . i am paying house tax from 2012 to till date. in this case which document is correct.