No Help for Accessing my Money

I am trying to transfer money out of my Nedbank chequing account to an overseas account i own. Online channels now allow this but the transfer limits are very low and the pre-populated SARB codes are not relevant to me. I have reached out for help with this via chat as I am outside SA atm, and was advised to email ***. I can only assume this account is unmanned. I have also reached out to Nedbank personnel who assisted me with the same 2 years ago but they are also dead quiet. What am I supposed to do here? Why is no one answering emails?