The only solution para po malaman at mas ma i explain po sa inyo is to call the hotline
Globe Postpaid hotline : 211 via mobile \ (02) 730-1000 via Landline
The charges above your subscribed combo whether used for calls, sms, surfing are deducted on the time of use basis and not totaled first then deducted as a whole.
Kung anong unang ginamit na hindi kasama sa inyong subscribed Combo (calls, sms, surfing or a combination of everything), yun ang unang ma-cha-charge.
It might have been that you used up your consumables for data first before you were able to call or sms (above your present allocation or combo)