If your VPN isn't working, you're having trouble installing a provider's software or you just feel like something's not quite right, then your first port of call should be your provider's support email or live chat option. Live chat options can be handy if the problem isn't causing you too much grief and is pretty simple to explain, but if you have an issue that's a bit more complex, we'd suggest using an email to raise your query. It might seem cliché, but whilst you wait for your response, removing and reinstalling the VPN software on whatever device your having trouble with is a good shout too.