Hi! I understand you're having trouble logging in to the eGovPH app because it says the OTP (One-Time Password) sent to your mobile number or email is "nonexisting." Let's try to get to the bottom of this.

To start, may I ask:

1. Are you using your registered mobile number or email that you originally signed up with?
2. Have you tried requesting the OTP multiple times or from a different network connection (Wi-Fi vs. mobile data)?
3. Are you using the latest version of the eGovPH app or accessing it on a browser?

Meanwhile, here are some steps you can try to fix this issue:

1. Verify your account info: Double-check that the mobile number or email you’re entering matches exactly what you used to register. The system will say "nonexisting" if it can't find that info linked to an account.

2. Update the app or clear cache:
- If on the app, make sure it's updated to the latest version from the app store. Sometimes older versions can cause OTP issues.
- On your Windows device's browser, try clearing the browser cache and cookies, then reload the login page.

3. Try password reset or account recovery: If the system says "nonexisting" for your contact info, it might mean the account wasn't registered or was deleted. Try to create a new account if you're sure you didn't have one or recover your account if possible.

4. Check network and SMS/email spam:
- Ensure your phone has a stable signal for receiving SMS OTPs.
- Check your email spam or junk folder for OTP messages.

5. Mobile number or email registered change: If you recently changed your number or email, you may need to update your account info by deleting and re-registering with the new details, as per eGovPH FAQs.

If after trying these you're still seeing "nonexisting," it might be a backend or account status issue. In that case, contacting eGovPH support directly at [email protected] with your full name and contact info is the best next step. They can check account records and help restore your access.

Let me know how these steps go or if you need help with any of them! Are you satisfied with the solution I provided so far?