eWallet pin generation not helping

I transferred cash to my eWallet but could only withdraw R200 because the ATM only had R200 notes. Since yesterday I've been trying to generate a pin to use to withdraw the the rest of the cash. The *120*277# USSD thing is not working on a cellphone contract sim because there's obviously no prepaid airtime.

Alternatively, I'm supposed to be able to use the FNB app to generate the new withdrawal pin. But my app says I have a zero balance (not true). A call center agent suggested that I transfer more money to my eWallet so in the process I can then select send a pin. But this is not a solution, it's a workaround. What if I don't have more money to send to my eWallet?

Last week It was a different issue. FNB's processes are very disappointing.