With respect to receiving two Kindle covers, I think I spoke too soon when I said that Amazon had sorted the issue. They tried to give me a credit for the return of the duplicate. So I contacted them again. Here’s the response.
Thank you for contacting Amazon.
I am sorry for the confusion caused with the item Marware jurni Kindle Cover, Black.
I understand that you have received 2 identical orders, so my previous colleague asked you to return the extra item to us.
I see that you have returned the extra item to us.
Once we received your return our returns department which automatic mistakenly refunded to you in the amount of 26.99 GBP.
In this case, we would like to have your permission to charge your credit card in the amount of 26.99 GBP for this order.
Please reply to this e-mail with your permission.
Rest assured that you have not been charged extra for the item.
Thank you for shopping at Amazon