How can we get the property/home transferred to the correct owners so that they can get benefits of owning it?

I am an executor of 2 estates. One estate is my niece and nephew’s father and the other is my nephew’s. Their father died in November 2004. We opened an estate with a family friend lawyer. Before anything was settled, the son of this man died in a motorcycle accident August 2005. We have an estate for a Father, whose heirs were a daughter and a son, then when the son died, the heirs became a daughter and the estate of the son. So to make a long story short: The father had a house. The deed to the property and house were to be transferred to the heirs (daughter and estate of the son). The father's estate was closed without this being done. Then the heirs to the son's estate were, his sister (or the daughter) and then his mother. Thus giving the father's home/property 75% to the daughter and 25% to the mother. Then the son's estate was closed. The property still has not been transferred over to the daughter and the mother. It has been 9 years. They have tried many times to get the lawyer to get this done. He either won't answer the phone calls, won't call any one back or won't answer any emails. At one point the daughter even reported him to the complaint board for lawyers in their state, which at that point the lawyer did respond & wrote up papers assigning the heirs to the property. We assumed he filed this with the State Probate court and the County assessor's office to get the deed transferred. Now another year later we find out it still has not been done! This has been 9 years! We still cannot get the lawyer to call us back or answer our phone calls. We asked the assessor's office if we could just file the papers ourselves, but were told that our papers were copies and that we had to have the original papers form the lawyer. We are at a loss as to how to get this done, now that both estate have been closed and this step has not.