Short answer
iVisa is not the Philippine government. eTravel is filed at etravel.gov.ph and the official page says it is free.
If you paid a filing site, check whether you actually received an eTravel QR. If yes, the QR may be valid, but the fee was for a middleman typing service. If no, file directly on the official portal.
How to check
- The domain must end in
.gov.ph. - eTravel itself is free.
- eTravel is not a visa.
- Save the QR screenshot yourself.