You can park your existing account if you have:
1) forgotten your password; and
2) don't have a MasterKey
The existing account under your old email will be parked. Its data will be preserved for at least 60 days. Should you remember the parked account's password or locate its previously exported MasterKey, please contact support@mega.nz to have it restored.
This will enable you to access the preserved data. Even if you manage to restore the parked account, all associated contacts and shares will remain deleted and need to be re-established.
Click on the big button to park your account and create a new one: