I have downloaded a deck, but it is not shown on my decks

Does anyone know where my deck is and what to do with it, when i try re import it it says it is already in my decks, but i cannot see it anywhere

It’s hard to tell you where to find it, because we don’t know where you’ve looked so far. The ordinary places are in your main Decks list, and in the Browse window. Depending on exactly what you imported, the cards may have been created in an existing deck, rather than making a new separate deck.