Don’t see that every day.
I rather like this taxonomy of exceptions: https://blogs.msdn.microsoft.com/ericlippert/2008/09/10/vexing-exceptions/
(came up in a recent discussion)
Problem: online shop inexplicably fails an address check on your credit card (despite entering exactly the details that the bank has), and support for said shop refuses to believe that the error might be theirs.
Solution: use different online shop.