We cannot really provide support via the medium of the community.
End Customers are usually unable to open a ticket directly with Poly support. Available End User Poly services offerings are detailed here
Our records show the VVX in question was sold via ISOLIN TRADE & INVEST LIMITED back in 15/08/2018
As the unit is no longer within the warranty please be prepared to Pay Per Incident / PPI. This is all outlined in detail here
Other community volunteers can try and help you but if you need support please go via the official channels.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels. Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's