URGENT: Why is my 'What is My Country?' tool showing incorrect IP Geolocation results?

I am seriously stuck and incredibly frustrated right now. My web tool, 'What is My Country? - Find Your Current Country & IP Location,' is experiencing a critical issue with its IP geolocation feature, and I've been troubleshooting for hours with no luck. Users are reporting wildly inaccurate location data, and it's causing a massive headache.

• The Core Problem: Users are consistently receiving highly inaccurate country and IP location data. For instance, someone in Germany might be shown as being in the US, or even a completely different continent. This isn't just a slight inaccuracy; it's often entirely wrong.
• Troubleshooting Steps Taken So Far (and what didn't work):
  • I've meticulously confirmed the status of my primary third-party IP geolocation API provider – their dashboards show everything operational, and I'm not hitting rate limits.
  • I've scoured server logs for any errors related to API calls or data processing, but nothing obvious is jumping out.
  • Application caches have been cleared multiple times, both on the server and CDN levels, to ensure no stale data is being served.
  • I've conducted numerous personal tests using VPNs and different networks, and the results are incredibly inconsistent – sometimes it's accurate, other times it's completely off, even for the same IP address after a short delay.
• Urgency of the Situation: This isn't just a minor bug; it's severely impacting user trust in the tool's core functionality and generating an overwhelming volume of support tickets. People rely on accurate data, and when they don't get it, they immediately assume the tool is broken.

I'm at my wit's end trying to diagnose these widespread IP geolocation discrepancies. Has anyone experienced similar issues with their IP lookup tools, or can you point me towards potential causes I might be overlooking? Any urgent advice or insights from an expert would be incredibly appreciated!