I informed bank to change of adress but they didnt. I lost my money bcoz not received lnformation .what to do?

my F.D.R.was matured . due to some family reasons I was shifted to other town and was not renewed the FDR meanwhile I informed bank about cahange of adress.according to bank my money transfered in investors education fund and they say they informed on my old adress.when I asked why so / no one is ready to answer. every one say contact this and that .