To cancel your subscription click the VPN Administration button on the left hand menu of https://my.liquidvpn.com/clientarea.php 
Click VPN Administration 
Click the service you want to cancel
Click Request Cancellation
Choose to cancel immediately (takes up to 24 hours to process) or at the end of billing period
Either option will stop your subscription before being billed again.

Also Read

Can I use LiquidVPN instead of my ISP?
No, a VPN works in conjunction with your internet connection. It cannot be used to replace your...
Do you limit users data usage or bandwidth available?
No, LiquidVPN will never impose bandwidth restrictions or data caps on a user. In fact we...
Will LiquidVPN work with my router?
Because we offer OpenVPN, PPTP and L2TP LiquidVPN should work with most routers. Routers with the...
Can I use LiquidVPN on a mobile device?
The short answer is yes However we have not released our mobile VPN client yet so you will need...
How fast are your VPN servers?
LiquidVPN only runs dedicated baremetal servers with 1 Gbps or 10 Gbps ports. We only use premium...