Standard bank-poor service

Standard bank was appointed as the executor of my late mothers estate.She sadly passed on ,on the 23rd April 2012,and left behind 7 heirs to her estate.During the past 3 3years,contact with Standard bank has been virtually impossible.To make matters worse we have been dealing with 3 different people in the Estate Late( Deceased department),since 2012.Just when we become fami**** with one standard bank member you are told that she is no longer handling the late estate matter. Is it normal practice for an estate to be wound up,to take so long?Today we received information from an Estate agent saying that one of my mums properties has been sold,and we need to evacuate from the property.Standard bank has not informed any of the family members concerning this sale .