Deceased handed over to law firm

My mother died in November 2013. Today I receive a letter from Bham Dahya attorneys stating that whoever has taken over my mother's estate owes money on her credit card. ABSA handed her account over - and yet ABSA told us they are not going to handle her estate because there is nothing in it... So I took it to the Master of the High Court and her estate was signed off being under R100 000.00 She owned nothing except her car which we sold to pay for her cancer treatments... everything else is is my father's name (married out of community of property).<br> The first time I received this letter from the attorneys, I explained everything to them via email - however, I get another letter demanding same.<br> My mother is DEAD! you will not get the money.