Help me get my car fixed please

Hey, my name is Jade. If you know me you know I’ve always busted my tail to get back on my feet. I don’t sit around feeling bad for myself for more than a minute & I never let life take away my spirit. But this is just too much for me. I really need help, otherwise I would never do this. I hate having to ask for help, especially financially. I’ve been working on building my credit for a long time but when I got my car 8 months ago the only place that would sell me a car was a buy here pay here (US Auto Sales). I got a service warranty but they’re not covering what I need to have fixed. Even though the things that are wrong with my car are ware & tear problems that should have been maintenanced between 90k & 110k miles. (I got my car at 122k). I’m sure the people I trusted to sell me & my 4 year old son a good & safe car saw the problems before I was sold the car & just decided to let it be someone else’s problem. But either way there’s nothing I can do about that now. They won’t replace my car either. So I’m just kind of stuck & making payments on a car I can’t even drive. I was on my way to work one day going down 85 & the car just suddenly stopped telling me to pull over to a safe location & that the hybrid battery fuse needed to be checked. Upon further inspection & diagnostics (and I might be saying these next things wrong)- the hybrid starter/generator belt is cracked as well as the main engine serpentine belt. I need a new power relay assembly & a high voltage safety plug. I need a safe car for my son & myself. I have to keep working & I can’t afford to lose everything I have worked so hard for. Anything helps please. I’m trying to save money as fast as I can & it’s just not making a dent in it. I really appreciate you reading this far & I’m sorry I even have to ask but thank you so much to anybody who is able to do anything for us. I love you guys.