At Bitpanda, click on “Wallets” and, through your Litecoin wallet, purchase the amount of Litecoin you ordered plus 0.0005 LTC to cover the transaction fees. In the example above, the total is 0.852326 LTC (0.0851826 + 0.0005 LTC).
Once you see the LTC in your wallet, you can withdraw it and send it to the address on the checkout page.