Can someone with wordpress & theme customizations experience help me?

I'm trying to change some icons of a theme with code but its fucking imposible, I don't know what fucking file is generating that icon, it's a icon from flaticons with "flaticons font".

I've already changed the fucking font of flaticon but the fucking same icon is appearing, why??

please help

Have you tried clearing your browser cache or using a different browser?

Have you try to clear your web cache? or another way, you can try to preload that