Kganedi Attorneys please respond via email this matter is serious and long overdue

Moleke Matsepe Attorneys Marble Towers Jeppe street passed away and Kganedi attorneys took over but they Not updating me regarding my late mother's Deacesed Estate from 2015 Nelly Thembi Dlangalala I D. 3208080162083 Where and Whow do I excalate this matter I'm desperate looking for Letter of Authority