on 18-10-2012 11:52 AM
Your question isn't entirely clear. Are you trying to change the Nectar account you have linked to eBay?
If you've just signed up for a new Nectar account you will be issued a card for that account within 12 days.
If you're trying to unlink one account and relink a different account you may need to call the Nectar helpline team for that. You can find a contact number for them here: http://pages.ebay.co.uk/nectar-rewards/faq.html