My optra cart is not working

#storing  I have a Chevrolet car -optra limit 2007, it is my fighting car, although they see it as an old man in Venezuela, you could say that it is a new car.
Lately with the gasoline problems that exist in this beautiful country, it is brought from other countries by our generous leaders. Sometimes gasoline comes from countries like Turkey, Iran, Russia and others.
Well, these different types of gasoline have affected the vehicle fleet in Venezuela because the octane numbers are either very high or very low for our cars, damaging the gasoline pump. According to a very complete explanation given by my mechanic.
I had no choice but to buy the new part to get my car working again.