Support me as a single mum

Im a single mother of 3 boys(they are 17, 18 and 21), having difficulties with financial in raising up my childrens. I was working abroad and left them with my parents after my divorced. Now Im back to my own country since my mum passed away and my father not in good health. I just let go my god job with good money just because to raise them..Since im back here ..its almost 3 years and lm always struggled with my financial :( now my youngest son just finished his spm(o level) exam and im worry how to get money for his college. And i just received a good news yesterday that my middle son was succeeded for his interview recently for vocational courses which is needs money for his registration and transportation.

And i dnt want because of my financial problems will put them down as what happened yo my eldest son. He has to stopped his study in college because i dnt have enough money to support him and now his in depression stage. And my father just newly diagnosed with heart problem,he has 2 blocked in the heart that need surgery soon.

I hope people out there can help me out. I know this is very embarrassing to ask donation but i have no choice.