Shocking service from Standard Bank Trust

I have never experienced such poor service from a 'supposed reputable financial institution!! My mother passed away in September of 2017 and her Estate is still pending with Standard Bank 5 years later! I have had minimal communication and information about the reason/s for this massive delay. Approximately 6 administraters working on the Esate over 5 years - it is like it is just being passed around and nobody actually wants to handle it. I am promised calls and they never happen. This is dispicable and highly unprofessional and frustrating for me as a client as theis is out of my hands and I can't take it to anyone else.. my hands are tied. Any suggestions????? My next move is to approach the local Ombudsman to revies this matter? RE: MRS LETA WELTHAGEN ID NO:***/COMPLAINT REFERENCE ***. Mr Danie du Toitis meant to be my current executer and I have not had 1 call or email from him. I was promised a call on 14 Feb and still not a word or email. Disgusting.