Don't use a proxy server(especially a free one as many or them are already well known and easily blacklisted), use a VPN.
vpnbook.com has a bunch of free accounts that give you a choice of Canadian, US, and EU servers. (the catch is that they change passwords on a weekly basis so if it stops working, you gotta go to the site to find out the new password, torrents are not allowed, and you gotta use your own VPN client. I use openvpn.)
