result! i emailed about a refund (note i didnt call!) and this was the reply
Dear Claire,
Thank you for your reply regarding your order 12205 from the Pets at Home website.
We will refund you £4.99 onto your payment card with our apologies, please allow up 30 days for the money to show in your account.
I apologise for any inconvenience and hope we can continue to be of service in the future.
Kind regards,
Philip Johnson
Pets at Home