> Getting the customer to call a number is another, they could have transferred the customer.
No way. If someone claiming to be a bank cold-calls you, you tell them you'll call them back at their official number. Only deal with bank information on a call that you initiated.
I don't know how to work around the flaw in the article. Luckily it's not something we have to deal with here in the US, as far as I know. What a dumb "feature."