help me to get a computer for my studies

i am from sinaloa mexico, and i am in highschool, i really need a laptop but my family can't afford it, the goverment always promises laptops but they are so corrupt, I walk 4 kilometers to go to the cybercafe almost every day to do my homework, any donation would be very helpful, 6 days ago I started working in a small store but the pay is very low and I do not have enough time with the school, any donation will help me a lot, big thanks