Hello! Let me give you my "advisement", tweet @talkeglobe (if you have a twitter account) and ask them if your sim is still active. Or you try other channels to voice out your concern, just visit http://www.globe.com.ph/contactus Or wait until the admin/mods give more "advisement".
You can activate your roaming service via MyAccount at http://accounts.globe.com.ph
Read Self-Service to learn more.
For further assistance, I suggest you to raise this to our Twitter Specialists at http://www.twitter.com/talk2GLOBE or any of our support channels listed at http://www.globe.com.ph/contactus and they'll be more than happy to assist you with your account-specific concern.