Tried 2 of my debit cards (different banks) as a visa credit type and still won't let me add a new debit/credit card to my account.Okay, might have a solution @Clavas.
I have Visa Debit cards which haven't been working as previously mentioned but changed to the Visa Credit option despite using a Visa Debit and that appears to have worked as it's saved now!
Give that a go if you haven't already.
Thanks for your help - @Hot Since 82, @shieldsmp, @Keith S30S.
I don't have any saved cards and won't let me purchase anything
When you try to purchase using a visa debit card and enter the card number but set the card type to visa credit it gives an error saying please check your card type is one that we accept