The struggle of being a single mom

Hello my name is Carrie, I am 35 years old. I have 3 children 15, 11 and almost 2. about 4 years ago I thought I met the love of my life after my marriage ended of over 13 years ago. I share 50/50 custody with their father, but about a little over a year ago I ended my engagement with my fiance for the safety of my children. He got hooked on drugs and became violent. The second I found out he was using I kicked my best friend out to protect my children. He is the father of my youngest. He cleaned out my bank account, hacked my daughters bank account. I have sole custody of my baby boy and have struggled keeping a job, due to the fact I have no support system. Everytime daycare calls I have to leave. Long story short, I am facing eviction, my car needs repair it is stalling at every light or idle. I am not receiving any form of child support and my county does not provide a whole lot of help. I am enrolled in school as well. I am working my butt off to better my life for my children. I have maintained a 3.94 gpa in the last 2 years. I have been on the presidents list and deans list. I am currently on a temporary work assignment, but once my car completely stops or worse I wont even have my temp job. I need help to fix my vehicle so I can try to catch up before I am evicted. Any help will be appreciated. It is just me and my kids and have no where else to turn for help. I have medical issues that I have set aside just so I can try to be here for my children.