It sounds like a frustrating situation, especially with the long distance to the nearest service center. If you've already tried everything—including the reset steps, cleaning, and charging—it's likely that the issue is hardware-related. In this case, there are a few options:
- Contact Apple Support Online: You can reach out to Apple Support via chat or phone and explain the issue. They may be able to arrange a replacement or provide you with a solution, even if you're far from a service center.
- Local Authorized Repair Centers: Even though there's only one licensed service center, check if there are any third-party repair shops near you that might be able to assist with diagnostics, especially if they have experience with Apple products. They can sometimes provide repairs or offer solutions that won't require traveling so far. Although they might be unreliable.
- Apple Store or Authorized Service Center: If it turns out to be a hardware issue and you're unable to fix it, Apple might offer a replacement under warranty. It’s worth checking if you can get them shipped directly to your location or if they have a mail-in service.
Here is the apple support website: Official Apple Support
I understand it's a hassle, especially with the distance, but Apple Support should be able to help you from afar without requiring an in-person visit right away.
Please let me know if you still need any assistance.