If you are NOT under a locked period then you just pay your outstanding balance and request for a termination instead of a reconnection.
If however you are still under a locked period, then aside from the unpaid balance, you would have to pay for a Pre-Termination Fee which would depend on the type of plan you are subscribed to specially if you availed yourself of a device. For the Best Ever plans, it is computed as:
Handset Base Price [HBP] - Cashout / Total Holding Period x Remaining Holding Period
To get more details and your exact amount, it is best to get in touch with the channels in www.globe.com.ph/contactus