when you Launch the game in the launcher is the Riht dada selceted?

I have a Problem
I have started Playing the BO2 launcher 2 days ago... The first day it went well 10-20 ping on low graphics bc i have an old PC and yesterday when i was Playing, my Ping started going up to over 70-80 causing massive lags but only on the BO2 Plutonium other games like League or Minecraft worked well with a Ping of 20 or less but the Ping on Plutonium still is between 50 and 80 i cant Play the game normaly can Someone help me Fix it so i can go Play with my friends (it started when i tried to Play Mob of the dead with a friend since then i have Problems on Multiplayer and Zombies) Pls someone help