@RenjolynC 
Thanks for the reply. I do not wish to waste time with add-ons like OFX. I need QuickBooks to work as it should and that includes connecting to Nedbank. If this error has been resolved, then why am I still unable to reconnect my accounts and what is an error 155A?

I have a reference number from my online chat this morning (the one where the agent told me "not to worry"!)
The reference is 1579674884

Please escalate this problem as as far as I am concerned, this issue has not yet been resolved