How can I obtain a replacement top up card , my dads is damaged, probably due to years of swiping

You can find the info on the Vodafone website.

http://support.vodafone.co.uk/Accoun...p-my-phone.htm

It says:-

Pick up a TopUp swipe card for free from any Vodafone store. Once you’ve got one:

First, link the swipe card to your phone by calling 2345 free from your Vodafone mobile and follow the simple instructions
Use the swipe card to top up at any shop that displays the green TopUp logo
Choose the amount you want to top up (from £5 to £50)
Hand your swipe card to the retailer to add the top up to your phone
Pay by cash or with a debit or credit card

Thanks

People still use top-up cards...