They claim to deposit a sum of money 14 years ago .... in normal world, normal people have record of such transaction. So either the bank did or did not receive the money. Secondly, I don't see anywhere that the banks are allowed to confiscate accounts after 5 years. I know BOC does something along the lines, but after much loooonger time, something like +20years .. not five. And they call it orphaned accounts or something along those lines.
I don't recall my bank telling me ... "Hey if you don't touch your account for 5 years we are taking your money ..." ... surely for them to do that, their actions would be backed up by some sort of law or regulation. Would love to see the source for that ....