I would launch what the artillery call a ‘hurricane bombardment’ of the bank, in all forms of comms, to get that cancellation done. If the bank is geographically accessible, I’d be in their faces regularly.
And chivvy your lawyer on, too. I’m sure you are getting assurances that it’s all going to be all right but why not assume the opposite, on the basis that it’s safer that way.
Everybody [of a certain age] remembers Nikita Khruschev at the UN taking off his shoe and banging his desk with it. Nobody can remember the nice guys trying to calm him down.