Mom of 3 car's air conditioning stopped working.

I'm Amanda, an American EFL teacher and mother of three. I live in Brazil, an area that is super hot all year round, and my car's air conditioner stopped working. I use my car to get to work and take my girls to school, as no bus can take them. I have been having health problems due to the high heat, especially while driving. Unfortunately, the school where I work just cut my hours, and now I cannot pay for it. The quota I go was around 2k and I just don't have the money right now. 1800 will go to fixing the air conditioner and 200 will go to medication to help with health problems.