Nedbank's small business account still not working

We are now cut off from our Family's Trust banking account since 18Feb21. It is financial year end now and we cant pay the bills. This is now as a result of Nedbank's new back-account platform that we cant log into. We wrote an email to Fiona (our banker) (2 days before the deadline) and explained the problem and asked her to fix what seems to be a relatively easy setting. All we received back was an automated reference number [Chrimaspie trust new platform-email [<AX***>] {***}]. No action and no reply. We are still locked out and cant pay the bills.