Unresolved Estate, unsatisfactory service

Its been over 17 years yet Alexander Forbes still hasn't rounded up my late grandmother Estate. Firstly a statement hasn't been issued of the value of the estate, communication hasn't been clear and it seems like there is new developments everytime feedback is sought. It looks like there have been so many delay tactics around this matter, so much so that even my own mother recently passed away and she obviously never inherited her rightful share and Alex Forbes was made aware of her untimely death last year and still hasn't updated the family on what would happen to my mothers share of the estate. I have fears that their not following the set out interstate succession Act 81 as prescribe by our South Affican Law. So now we have 2 individuals deceased my late grandfather and my mother who's shares are suddenly not being brought to discussion. This process should take no more then 6 to 9 months to finalize but we have been at it for years as a family submitting all relevant documents however conclusion still hasn't been reached. Our recent conversation has been with a LN Maako as Estate Administrator of Alex Forbes.