Direct Contact number not Listed for Yi technlogies

Does any one have a direct phone number that we can contact Yi Technlogies. On their webpage it says contact us but only have an email listed to contact. I am a premium member service of their cloud service but they refuse to send me a phone number when i ask them by email. Please help me solve this problem.

We understand that you want to talk to an agent over the phone.
Our phone support hotline is available Monday through Friday from 6:00 AM-5:00 PM (PST).
You may reach us at 1-888-878-1584.

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