I was with them ~ 5 years. When I ported my number to a different carrier, they refused(twice by phone) to cancel the account. They said they had to wait for some unexplained notification email. This was over a week after my # was gone and they still said they were going to continue billing me. It was like an argument about politics with someone who has made up their mind and will not be swayed. I had to have my bank stop payment to get away from these fiends! Avoid at all costs, they will try to hold your phone service captive.
Recommendation: Don't do it