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Update; Murphy's law - I contacted the bank to file a dispute. That night, NI responded to my first email saying 'be patient'. Next morning it...
Thanks for the advice. I'll follow that up on Monday. Still can't believe that they have been impossible to get any info from. Do they really want...
At least you got a reply! Mine hasn't turned up either. I have sent emails to them - all ignored. Tonight I've made international toll calls...