We’ve made the difficult decision to discontinue the Yahoo Communities effective Jan 24, 2019.
Be assured you will still be able to find answers to your Yahoo product and app questions on the Yahoo Help website (https://help.yahoo.com). In addition, you’ll be able to find the Yahoo Community moderators on Twitter, responding from our many handles including @YahooCare and @YahooFantasyCC.
If you ever need help with your Yahoo accounts, try Yahoo Account Pro for 24/7 live phone support.
How long had the account been deactivated?
Can you be more specific? What that be more than 30 days but less than 6 months? If not would that be closer to 12 months or 18 months. The longer the account has been deactivated the less likely it is that you can recover this account.
What part of the world are you in? Being that it's been more than 30 days there may be nothing that can be done to recover this mailbox.