Plutonium

Hello, I have a problem that to solve it I must use a VPN (the problem is that I cannot log in without VPN) but when I use it on the black ops 2 servers it does not let me log in because a message appears that says "You are kicked for the reason VPN" but when I deactivate the VPN I cannot log in and my signal is cut off and I cannot play, even so there are servers that do let me log in but it is difficult to find them

I need help since I enter my username and password correctly but I get this error that says "an issue when logging in" and I have been like this for quite some time and I can't find a solution to this problem