FNB's System Maintenance Left Me Stranded at Night causing crises, No Accountability, No Support

I am a longstanding FNB client with multiple active accounts. Earlier today, I confirmed my account balances before departing home via Uber to attend to a patient for a scheduled house call. Upon arrival, I was alarmed to find my balances had inexplicably vanished. Faced with an immediate need to pay for the transport, I arranged for an associate to make an immediate payment to my account. The transaction was confirmed successful on their end. However, the funds did not reflect in my account due to "system maintenance"—a fact I was made aware of only after contacting your business desk. It is now 23:28 on a Sunday evening. My phone battery is critically low, and I am stranded in a public area with my laptop and phone, forced to walk over 11 kilometers to get home. I contacted four separate consultants, each of whom dismissed the matter with "Sorry for the inconvenience" and offered no resolution, merely a vague assurance of a callback tomorrow. This is an unacceptable and dangerous outcome arising from a failure in your infrastructure and communication. It not only disrupts my professional commitments and financial security but places me at personal risk. Be advised: I am formally documenting this incident, and it will be escalated to legal counsel for review and potential litigation. I expect a detailed written response, accountability, and immediate remediation. I am prepared to involve the appropriate regulatory and legal channels should this matter not receive urgent and professional attention.