So, you created a Twitter account but haven't touched it for months, it has become de-activated and now you want it back. This might just be possible...
- Follow the account @support.
- Send them a DM (direct message) with the inactive username you want to restore
(example : “dm @support Hello, the account @userID has been inactive for a long time, can you get it back for me? Thanks").
If the account has been inactive, the support team will delete it and you will be informed of its availability.
Good luck!
For more info on Twitter, please see Twitter: how does it work?