When did you buy the tickets - before June or after the re-opening was announced? If before June, they should have automatically been extended to 9/26/2021. If you purchased after the re-opening was announced, they did expire last month but Bob is incorrect - expired tickets do disappear from the guest’s view but WDW should be able to see them. It used to be that expired tickets could only be upgraded in-person, but last winter folks reported it could be done by phone and I haven’t heard otherwise this fall. I would call back and hope for a more knowledgeable CM. With only a few exceptions of some less-common tickets, fully unused tickets retain value towards a future upgrade.