According to Snapchat, it can take up to 24 hours for an account to reactivate. Accounts with a lot of data to recover (including friends, conversations, saved chats, Memories, and more) may take the longest to reactivate.

How long does it take to reactivate Snapchat account?

If you decide to reactivate your Snapchat account before 30 days have passed, you can do so by simply logging back in with your username and password. It may take up to 24 hours for your account to reactivate.

What do you do when your Snapchat wont reactivate?