GCash review: complaint

I received a confirmation of Gcash even if I did not sign up for it. Called customer service to report but was transferred to an endless number that no one answers. How come a registration was confirmed to my mobile phone even if I don't register for this service nor having any knowledge about this. Is this phishing or are globe numbers being used for transactions that are not legitimate. You should be aware about these instances because someone might be using another persons information. Data security is a serious concern. I hope to get a response about this if not will take it further. Thank you.