My parents overcharging me in rent

So I pay 1600 per month they take 800 every paycheck and im left with 500, my check are 1300, our rent is 2300 for 3 rooms, I want to ask them if they could lower the rent or leave me with a full check to myself one check then I pay 800 with the next and the pattern continues because I’m never left with full check to myself ,im 30 and I lost my car recently so I want to save up for an apt. 1st because then it’ll be easier to save up for a car once I get my own apt…I don’t think this is fair right?