Globe — unauthorized charges by 2123 facebook on globe

I am a GLOBE prepaid subscriber the particular promo by 2123 or facebook in globe charges me but I never subscribed for it. Although it only cost Php 2.50 every now and then it has become irritating. I never use my celphone in surfing the net, mostly sms to friends, now I believe who the culprit was when all of 2 loads of Php 20 just disappeared. Come to think of it I probably lost Php 42.50 in all for something I didn't use.This 2123 on Globe should be blacklisted or much better banned all together