5. If you have succesfully draw some items from the exchange inventory of your other character, please go to the website and see if some sealed item(s) will appear.
I think this will be it. Try do it on different characters and see if there is any other items to unseal then after relogging both game and website. If it still didn't work, all i can suggest is to keep sending tickets till they get annoyed by it and go fix it themselves. One can always hope, eh.