I have tried to many times to add my new credit cards details, and when it is all done, it just says add a vaid expiry date or card no on reverse of card. I also tried Debit card, just the same. I have a basket of food to be delivered on Wednesday, but without payment details, this will not be possible.
I can only think that your site to enter these details must have somehow gone down? I have tried so many times.