Lost my green card and i need to travel to venezuela this friday, What can i do?

I dont have the money nor the time to replace it. I know leaving the country is not the problem getting in is/ But im trying to reach the immigration officers but i cant get a hold of them. i am 18 and i am travelling to Venezuela for a month. This was completely unexpected ! i am totally freaking out! any advices would be very welcome and appreciated ! thank u guys