If you have not received the OTP via your mobile number, you can click on the "Verify Email" link or "Continue my application" link again to resend the OTP.
If you still have not received the OTP after clicking on the link again, this can mean that the number encoded on the online form may be incorrect. You can try to sign up again with the correct mobile number.
Please take note of the flag on the left side, right before the start of the number, as this indicates the country code. If using a non-Philippine number, make sure to click the flag and select the correct country code