Thanks for the reply.
I have used PIA in 2013 which i purchased for a whole year but didn't renew it because i got a better deal at cyberghostvpn.
I have few more queries
Is this your own personal account?
Are we allowed to change email address?
How are you sure that it will automatically renew for next year?
This is not my account however a close friend of mines.
Changing the email will void the 2nd year and further on autorenew so I'd suggest you not to.