The safest action to take if someone claiming to be from your bank calls you to ask for amount information is to

The safest option would be to not give them any account information unless you were certain the person actually worked for the bank, although it is never smart to speak of bank information over the phone. Most banks more than likely wouldn't discuss account information over the phone for this reason, so the safest option would be to not discuss any information.

Call the bank and tell them whats happening

How can we answer it? we need more info on the question lol.