Bad Service at Standard Bank Estate and Trust in Hyde Park

Hi, My past away in Jul 2021 and to date we have not had meaningful feedback on the process of unwinding her estate even after submitting all the required documents; the person responsible is Mr Marothi Mojapelo who never responds to email or telephone conversation. I am at the end of wits with trying to get feedback and the rates and taxes for the estate are escalating, please help get Marothi or Standard Bank to assist us as a family.