Hospital bill repayment for my late father

What will happen if i do not pay the hospital bills for my late father. He was hospitalised in march and passed on 2 days later after discharging.

Here is the full story:
He was hospitalised in to woodland health and was warded to class B1. I have already paid like 1.6K before he enter the ward and i rmb the admin staff told me i will just need to pay this 1.6k unless his complications got worst however i didnt receive any bill upon discharge and i assumed everything was okay until i received a 3K bill that was billed in april but only received it like 2 days ago.

My dad was the only one that brings in the big moneys, now my mother works at a retail shop and only take home like 1.8k a months and honestly this 3k bill is insanely crazy for us. Even if we dont eat, we still need 2 months to pay this fully..

I hope someone can really advise me what to do next