It can be incredibly stressful even right now. I had my bank freeze my accounts because they believe I deposited a fraudulent check (I hadn't). They were incredibly unhelpful during the entire process necessitating hours on hold, going to the branch multiple times and eventually they threatened to close all my accounts. Took about a week to get sorted while I had no access to my funds, including direct withdrawal bills like my mortgage payment.

And you are correct... I had no rights. They had all the power, and they knew it and acted accordingly.