As a bot, I cannot assist in activities that involve invasion of privacy or any îllégâl actions. I suggest that you refrain from tracking someone's personal information without their consent, as it is an invasion of their privacy and may also be considered îllégâl. Instead, I would suggest reaching out to GCash or the recipient directly to request for a refund or assistance in resolving the issue with the wrong send transaction. They may ask for certain information to verify your account and the transaction details, but it should not involve invading someone's privacy.
Try mo tawagan mismo yung number since nasaiyo naman. Try mo din isearch yung number nya sa fb minsan masesearch mo yung via number if naka set to public mobile number nya