How terrible! My closest bank came up on generator power less than 48 hours after hurricane Wilma hit us. I don’t know what you can do except complain to their management but I can’t believe they wouldn’t serve the community when you really needed it.
You are definitely correct though. It’s always easiest to get everything you need before the hurricane hits, not after!
After the hurricanes in 2004 & 2005, Florida has mandated that most gas stations must have emergency power. Telephone and cellular sites have always had back-up power but..., if the power outage is extended..., that power is depleted since it is from battery banks and propane powered generators. Having run on generator power for 17 days during 2004 & 2005, I hope I don't see such a situation in the future but, preparation is the key...