If you have issues with BestVoiceCall, make sure that your Windows firewall and security program don't block the connection. Also, it's possible that the servers are temporarily down or under maintenance. I suggest you reinstall the software and run it using Administrator rights. If your problems are not solved, you can use an alternative application from the developer's web page. If you still need assistance, you can use
sales@BESTVoiceCALL.com e-mail address to get in touch with the Support Team.