Here are more things you can do to keep your account secure:
1, Do not trust any messages from non-official account and never click suspicious links on messages.
2, Connect your kumu account with your phone number..
3, If you can't login using your phone number, please send an e-mail to email@example.com.
4, Never buy or sell kumu accounts, never give away your login information (eg. username & password) and never share your kumu account with others (eg. share your kumu accounts with others).