Debts issue

Hi sir,my English is bit low,pls adjust,in 2010 i had a good friendship with an aged lady,she made me to love her daughter so that i will marry her,i did,and her daughter too,keeping in mind that i am going to be her son in law ,she gave me 3lakhs rupees in splitted time to manage my financial problems,she deposited into my account,later she and her daughter started to dominate me in each and everything in my life,as i realized their worst behavior day by day finally i broken their marriage proposal,then they started to torture me by calls,and threatened my parents also,insulted me by spreading wrongly abt me to my colleagues,friends and relative,everyday they will call me and scold me and ask abt money,then i almost tried for suicide ,but i couldn’t,then somehow i got loan amt 3 lakhs,i repaid to them completely by cash,now i thought everything is over,but again she went to my bank and took my bank statement by telling lie as she is my mother which is dated on 2010,now by showing that she is indicating that this amt i deposited,so give me back,but i paid her back completely,only mistake by hand,there is no agreement between us,only she showing her amt on my bank statement which is true,now she is threatening me that she will take legal action,how can i prove,and how can she prove as it hapened in 2010 and there is no agreement except my bank statement says her deposited amt,pls help me