Venting or advice. At a loss.

Okay so finances have been a struggle right now. We eat on $20 a week and that includes my daughter. We are behind on all our bills and we never splurge. My car is broken, the transmission is bad and the electrical and im behind on payments from not working due to unexpected early maternity leave. I still owe on the car, the car is in my exs and mines name. I havent had any contact with my ex for 3 years because of abuse and him stealing money and breaking into my house. I have tried to reach out to him about the car loan and car issues because I dont want to intentionally screw him over but he has not gotten back to me at all.

Im not the primary account holder.

My current husband and I are so overwhelmed trying to pay bills and theres no way I can afford 4000 to fix the car plus to get caught up on payments.

Im to the point where im about to voluntarily give the loan company the car back and just get by with 1 car.

I guess I don't know what to do at this point. I want to just cry.