If the bank does say fuck you, I'd file a complaint. If they still say fuck you, I'll reach out to the financial ombudsman service. And if they still say fuck you after that, I'll take them to small claims court.
What do you expect me to do? Investigate the matter myself? Buy myself an unlicensed firearm and look for the hacker to get it back at gunpoint?
What do you expect me to do? Investigate the matter myself? Buy myself an unlicensed firearm and look for the hacker to get it back at gunpoint?