In matters of this importance, I suggest that you write Globe officially about the termination of your subscription with a copy of your valid ID. Have it officially received through a signed receiving copy (or postal proof of delivery if sent via registered mail) so you could have something to show in case of conflict. I would not rely on email with the numerous email that they recieve (and the infamous system enhancements) as they could always claim that they did not receive any so your best bet is through the old fashioned way.
Globe or any other utility would not just terminate a subscription unless they have official verification from the subscriber on record.
In your letter, just mention that you have emailed them since December 2012 and furnish them a copy of those emails with subsequent sent dates without any response so you could further justifiy the reversal of the charges which you did not consume anyway.
I'm sure that in time this would be resolved.
Thank you for the advises. I will try to follow your suggestions. Hopefully it could be resolve soon. Thanks again. More power.