Account not being closed on a deceased matter!

I cannot believe that I am still receiving calls regarding my late mothers account. I have given her death certificate as well as closed the accounts. I have now received a call from a attorneys stating that they have handed over her account. Bear in mind it took me 6 months for them to close the accounts after sending every week her death certificate and all documentation required. I am completely disgusted that a YEAR later I received a call when this was supposed to be handled.