Email blocked for "security reasons" and no response from support for over 72 hours!!!!!

Email blocked for "security reasons" and no response from support for over 72 hours!!!!!

We don't have access to several email accounts with our domain since Saturday. We have emailed Zoho support daily insisting this is an urgent matter as this is our business mail and we have received no reply for 3 days.

We cannot unblock these accounts from our Admin panel, this is extremely frustrating and the worst service I have ever experienced. Our business is on standby because of your lack of competence. Who are you to stop us from running our business and not reply to us in 3 days?!

Please solve this as soon as possible.