You seem to have landed here because the verification failed. Here are some suggested solutions for verification problems.
Wrong linked account
You might link the wrong account. Make sure you own the account which you linked with !fn link
Wrong logged in account
You might be logged in to the wrong EpicGames/Fortnite Account. You can check that by visiting the EpicGames Website. If you need to log in proceed by providing your account details. If you are already logged in check if the given account name is identical to the linked one.
Other errors can be caused by server issues from EpicGames/Fortnite. Feel free to visit our Support Server and ask for further help. It might be helpful if you provide the error which might have been provided in direct messages.