How To Get Possession

Suri Venkata Rama Mohan I have purchased a land with area 1.13 Ace extent through a registered sale deed excuted by GPA holder in 2007. In 2009 the GPA holder filled a case against me with out paying the cash I have made the transctation and served notices where I am not residing in that address. After that my sale deed set aside without my knowledge and the petioner immediately transferred to second person in 2011,actually he got the poession through execution petion in Jan 8th 2012. In Jan 24th 2012 I have filled a petition mentioning the truth, but before that he made complete extent area transferred to second person,through second person he made some another transctations. In 2017the honourable court has given in favour of me and made the first person decree set aside, after this he went to high court for stay there also stay dismissed. Then he filed a Amendment petition which is contradictory of original suit that was also dismissed, now my question is how can I get my possession on my land and how to make all the transactions are null and void to me