Saying "I will divorce you"

I had given two talaaqs to my wife on different occasions and did not separate. After that one day in an argument between us she demanded that I divorce her. I told her that I will divorce you "Main tumy talaq be day don ga". My intention was only to make her afraid not a divorce. After that we live together and noting happened. After three months of this event my wife is claiming that I had divorced her on that occasion. While I am sure I did not divorce her I just said I will divorce you. There was no intention of divorce.