What issue are you having with VS? In general if VS cannot report the problem using Report a Problem then the fallback is to use the VS Installer. If you cannot launch either then that would indicate either a horribly corrupt system or perhaps a firewall blocking access to the Internet for the apps. Without any information about the issue though it is hard to say.
The support site doesn't really allow for reporting issues with VS outside of VS itself. WIthout VS running there is almost no contextual information to provide any sort of assistance such as VS version, logs, etc.