Try again tomorrow is the standard response to errors

I was on your online banking telephone line for 16 minutes, that agent could not assist me, as he was unable to connect with the correct department. He then referred me to another department which I had to call directly.

The other department could not assist me, they are not sure why there is an error occurring and I was told to try again tomorrow, if it doesn't work then phone back. Tomorrow is Saturday. From experience, try again tomorrow is just a stalling tactic which means I will be phoning back on Monday with the very same problem and time is wasted.

I would like someone to fix the error and not give an "I don't know why, just try again" response. It is your business I'm investing in, you are running the business, how can no one explain what the error is?