This is not a 3X8 system.
You should call a qualified vendor for this one, they will know how to lockup the system and restrict calls and do a level reset to revert system since you do not know the password.
The main thing in the meantime is make sure that ALL mailbox passwords are not easy like 1111 or 1234 etc since it is most likely the hacker got into that mailbox using those passwords then the setup or changed the mobile number of the user to one that is over seas.
Problem is you probably have mailboxes you cant even access.
Get that tech in, there is a few in Ohio.



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