basic VPN detection help?

hey everyone, i'm a total noob here with my first saas and i'm trying to block users based on their location.

but it seems like people are easily using vpns or proxies to get around my basic ip checks, and my geo-restriction isn't working at all. i need to stop this anonymizer bypass.

[2023-10-27 14:35:01] INFO: User IP detected: 192.168.1.100 (Location: USA)
[2023-10-27 14:35:01] WARNING: Geo-restriction fail for content ID: XYZ. User still got in from blocked region.

what's the easiest way for a beginner like me to implement some basic vpn detection or proxy blocking? is there a simple api or libary?

help a brother out please...