Contact eBay Customer Service for this, their lines open at 8 a.m. today.
Contact them this way.
https://www.ebay.co.uk/help/contact_us?id=4814&st=10
The contact links can be found on the left on that page.
Lines open today between 8 a.m. and 10 p.m.
They should be able to provide it, but if not, although it is helpful to give this to the seller it is not mandatory to do so, and the seller simply after payment is received, needs to mark the item as paid and dispatched.
