changing social media icons

I searched the forums, but was unable to find anything that was useful for me… I’m trying to simple replace one of the social media icons that my community does not use with a new icon that I made to replace it.

i have tried naming it the same thing and overwriting the image in my file manager, but the icon remains the same as default… I even made it its own name went into the main.css and changed that social medias image path to go the the ts3.png, but it did not work. the icons remain defualt

is there anyway to do this? below is the icon i made for ts3