Most free vpns are so overloaded or limited that it makes most Web browsing almost impossible. Look into a thing called private Internet access. Their site is
www.privateinternetaccess.com and it's only like 6$ a month. I use it all the time at work because work wifi blocks a lot of the good stuff.
They also advertise that they keep no logs what so ever so even if they were asked by a court to supply records, they wouldn't be able to.