extreme high ping

pls help me i have a high ping so my story

i have 3 days dont play cross fire so today i have play i look my ping evey time about 300 and go higher to 500 and more

that crazy

in my first time in cross fire i have a ping of 120-135 than much time later much patches and i have a ping of 189-204 okay its laggy and cant good play but i can play and now i have a higher ping ? 300 and mor epls help cant paly and love cross fire