why not grow something else (like food)?
that would reduce supply driving up the price. don't forget columbia also grows coffee. many countries produce it. not every consumer demands 'golden' coffee. most just want a caffein fix to get them through the day or at least get started. what about corn that they eat? is the crop grown decide by govt? if so that's the problem. over specializing isn't good for the little guy.
if they reduce by half the coffee grown (and grow food like corn, veggies, and fruits instead on that land, the price would have to raise a little and there would be no famine as they would grow food along with coffee.