Error Code 13215

ZOOM has implemented certain restrictions for participants from China. If they are free users, they will receive an error code 13215 and will be unable to join the meeting unless they upgrade to paid account. Meanwhile free users from other regions do not have such limitations. This is a discriminatory regulation！

And such regulation was not communicated to the users before they made a payment to purchase the service.  

I experienced the same. How can we complain or escalate this to Zoom? I even have a Zoom One Pro plan, but all mainland Chinese participants have this error code and can't join the meeting. This didn't happen to other countries, including Taiwan, Hong Kong, European countries and US!!

我遇到同样问题 如果不能解决zoom应该退款

I hit the same issue with error 13215 with Chinese clients,   upgrading my account to Pro, but no any help to me if Chinese clients failed to joint meeting, so request a refund.