Resignation denied

I badly need an advice. I know this is kinda late, it has been almost 8 months since I resigned to my old job. I submitted a letter for an immediate resignation last December for the reason that my father was in critical condition and that I have to go home to our province and take care of him but my company denied it in which on the later part my father died, I even send medical records to prove to them about his condition, instead they terminated me. I was just wondering if I can still file a case in regards to this? I did not received any return to work notice which they insisting that they send. PLEASE HELP.

what would be your objective? to get your old job back?

Illegal dismissal since no due process.file a illegal dismissal case at DOLE.