Just be forewarned even if you have a gasista Metrogas might not reconnect your gas. Many old buildings are not up to code and there was an explosion in a building in Recoleta last year and since then Metrogas is really more cautious.... I know several buildings including my mother-in-law's where Metrogas shut off the gas to the building until all the gas lines are changed out. It's a major pain.
My mother in law hasn't had hot water or gas for the stove now for over a month. One building where a friend lived last year was without gas for 4 months believe it or not.
So it may be worth it to see if the problem is isolated to your apartment or it's a building wide thing....