Contacting Roll20 ( <a href="mailto:team@roll20.net" rel="nofollow">team@roll20.net</a> ) or using the help centre would be your best bet. At a guess, the Pro rollback feature only starts saving the state for you to do your own rollback once you upgrade your sub. The R20 staff should be able to manually do it for you if you explain the situation and tell them the date you'd like it restored to.