In the description of what you get with the virtual ticket, it is written:
"Most replays are available until March 31, 2019. Community Night and closing night festivities replays are available for at least 1 month after the event. "
To me, that clearly indicates that closing night festivities can be viewed after the event has ended. There is nothing in the description that indicates that the content will be limited. The description implies that everything is included in the VT, and everything can be viewed after the event.
I see a lot of posts from people who has failed their refund-claim, but this is indeed false advertising on Blizzard’s part, and this should be reported to the appropriate consumer advocacy agency in each respective country if Blizzard does not provide access, or a refund.