Rang the helpline - it suggested that I use ring back. I did, and having waited for the ring back I was left hanging on the line with no messages, no idea of how much longer to wait- hung on 10 minutes and gave up. Tried the app, shows a different card to the one I have, so could not manage any changes on there. Tried phoning again, same problem with ring back - no one actually there. Gave up. Not been able to request new PIN. Wasted over an hour getting nowhere.