Just completed buying a card;and clicked on "Collection" to see it being activated. There was nothing there. A message shown on the blank page said that I had hidden all my cards ,which my Collection View menu showed was not correct. The message said to "go back to hidden cards". When I clicked on that I got a message that said that I had no hidden cards.

What's gone wrong here?? My purchase history lists all of the 74 cards that I have bought, including the most recent purcahse. Where do I go to resolve this ??