Home loan co-applicant

I have taken home loan from ICICI in 2009 for purchasing a house. The house is registered on my name. I am the whole sole owner. How ever while taking the loan, as the banker insisted for a co-applicant & I was unmarried, my mother was joined as co-applicant. Since then I have been repaying the EMI on my own. In 2012, the loan has been transferred to LIC HFL. By the time, I was married & asked for changing co-applicant but thry refused to do so. Hence my mother continued to be co-applicant of the loan even after transferred to LIC HFL. I have been paying the EMI on my own & closed the loan in last month. I have requested for originol documents but LIC HFL people are insisting that my mother shall be present for releasing the documents. Due to disputes in the family, my mother is staying at my brother. She is not coming & my brother is demanding share in the property. Now I am married, & got two kids. Though I am the wholesole owner of the property, primary applicant & sole repayer of the loan, they are refusing to hand owner proprty documents.. Please advise how to proceed!