Hi DSA. The 3V card billing address error was discussed over on the Tesco thread recently. There does seem to be a way to make it work without the error and without it doing the £1 pre-authorisation.

For the 3V card where you have had 3x£1 pre-authorisations debited, I found they took a week to be refunded to the card so you should get the £3 back next week.