Intocast refuses to pay what's due to my child

Hello Peter,I need your help, I lost my husband on 2021. I went to court and got the letter of Authority,I went to his company to claim they told me to submit all the documents including my banking details,I have waited and went there several times right now the boss is even hiding himself.I have only received the UIF money from labour department,the company is refusing to pay me the money that they have been deducting from him for 13years,please kindly help me I need to take care of my husband's child.