Im living in Venezuela and off course have a high pin.. ¿how do I offset this disadventage? Thank you.

dependant on your ping you need to basically aim in front of the person you are shooting, example from left to right you aim more right than normal. if using an automatic then aim even more to right and work your way back left. Avoid close up shooting as this proves to be a big disadvantage. Also when spawning dont rush as the lower ping players will spawn earlier and will be in better position.

Good advice from Jules regarding shooting where your opponent will be by the time your bullet gets there, you can also reduce your graphical demands in the games settings, ie resolution lower, turn off all stuff like dynamic lighting etc.
Also I have seen people with bad ping do well with a shotgun if the map is small.

Play on servers that have anti lag enabled better game for distance players