Poor service

My sister lost her husband last year November 2022 and his bank account at Capitec bank in Middelburg (MP) had funds, after the funeral she app**** for letter of authority at Middelburg Court where she was assisted so that she release her husband's money at Capitec Bank. She submitted all the documents requested from the bank on the 03 January 2022 and she kept on making follow ups and they kept on telling her she must wait 15 days then changed to 21 days then changed to 30 days and up to date she hasn't received her husbands money. She has 2 little boys she needs to take care of and bills her husband left behind. Please help