Teamspeak 3 Failed To Connect To Server

Hello

For a week now i have an issue with teamspeak. Week ago i was using teamspeak as usual and after restarting pc i cannot enter specific server . And everytime teamspeak poke me with " Failed to Connect to Server ' . I asked admins on the server to check if im banned and im not .

What I have tried doing :
-Uninstalling/Reinstalling -Updating Windows -Reverting to an older version -Flushing DNS -Using VPN -Changing IP Address . Adding ports . Adding teamspeak to firewall and antivirus -Buying it on my phone (doesn't work on phone either) + contacted my internet host to solve this + they've told me that problem is inside my pc . Also my bro who using the same router as me can join servers i can't normally.