maybe flush/clear your DNS cache and restart your browser,sometimes i got this too when using vpn,the DNS wasn't changed even after enabling my VPN which include DNS service but after restart it,it working well
this is what i am doing to change my IP from my ISP. and if i use vpn, i think my IP will change into a new IP from the vpn. maybe the OP will need to find the other vpn to change his/her IP into new IP. i suggest if you really want to use vpn, try to use cyberghost or zenmate, that two sites give option to use their vpn for free.
and if you are lucky, then you can found an activation code which can give you access into all their country in that vpn.