Not releasing my funds because their own internal systems are ineffective.

I have money sitting in an instant money wallet that I cannot access and desperately need. I work for a company where clients can pay via cash send from any bank. So a few clients used stands bank instant money. I filled the steps in the message added the funds to a wallet and I used my own debit card to settle payments to the firm I work for knowing I can withdraw the money and put back into my account. I tried for three days I keep getting technical error , then yesterday I downloaded the instant money app first thing is it never allowed me to put my correct surname it wouldn’t accept then when I put an old surname (I’m divorced for over a decade and do not go by that name at all since then) it went through. The wallet on the app showed zero. The ussd however still shows the amount of R1650. I called at least 5 times and each time the consultant was not able to assist me or tell me what’s going on. On the last call the lady told me that it’s coz the surname Standard Bank has does not match mine. I told her firstly that ussd doesn’t ask my name n surname, and she told me it has my ID No. my ID has the correct name and surname it’s not my fault if Standard Bank doesn’t update their systems accordingly. What’s more shocking is I recently opened an account with standing bank a few months ago and went into the branch with my original id and proof of residence, so why is it that it’s not updated? I’m at a huge inconvenience now because I can’t even buy my groceries or feed my kids because they don’t want to give me my money and I get technical error please try again later for 5 days today! Please release my money to me. I will close of my accounts with you guys and move our bond and insurances as well had enough of these people