Where can I get an access to RPS

Hello

I'm developing provisioning server and I need to get an access to rps.yealink.com and its API to make it all work properly. I have read all manuals and even wrote emails to sales@yealink.com and Technical support but still no answer received.

The manuals says that I should get an access from Yealink reseller or administrator but I don't have any of this in my city.
The access is needed to register devices via API so it could be provisioned via my service.

Please help.