My house is auctioned in court without intimating me

Namaste sir, I'm a serving soldier in Indian Army. I was purchased a house valued Rs 14,00,000/-from Mr X in 2010. Agreement of the same was done on 03 Apr 2010. During the agreement I have paid Rs 2,40,000/- by means of DD. Based on agreement I have applied for loan from Army group insurance in 22 Apr 10. Army group insurance issued me loan of Rs 8,00,000/- through DD in favour of Mr X. I have been paid remaining amount Rs 3,60,000/- to Mr X by cash. Finally Mr X transfer sale Deed on My Name on 08 July 2010. Mr Y knows the same. My parents r living in the said house since 2010. Already the said property was attached in the court on 10 Jun 2010 against promissory note for Rs 1,50,000/- OS filed by Mr Y. I don't aware of the same, but Mr X knows the same. Mr X passed away in Dec 2013. Mr Y filed EP in 2014 n court issued numerous summons n notices to wife n children of Mr X. Mr X n his wife both are Govt Employees. Their children are settled in abroad. Wife of Mr X n children received summons from the court n did not appoint an advocate n didn't intimate about the same. Mr Y mislead the court by put up wrong EC. Finally court auctioned on 13 Oct 17 my house for Rs 12,00,000/-. Now My house value is approx Rs 40,00,000/-. All r cheating me n as well as court. My parents uneducated n didn't aware about the same. I heard the news from my neighbors n reached my native place. I shocked hearing the same, still I paid my loan n Rs 6.5 lac outstanding amount. I'm humble request to all please give me valuable suggestion to me to save my house. Thks alot, jaihind.