Contact the hospital and ask them to put a temporary stop on your billing. After my recent surgery it was over a month until I had a majority of the bills, and even then they gave me a month stop to apply for their financial assistance program. Laws may be different in HI and IDK if you went to a for or non-profit hospital but its worth a try.

Check if they have any sort of financial assistance, the company that owned the hospital I went to wrote off a LARGE sum that my state insurance didn’t cover as it was a necessary procedure once I submitted my financials to them. You can also negotiate bills at many hospitals or set up a payment plan.

I don’t have the links to any resources out there but if you can buy yourself a little time to get those refunds from Amazon that’s probably your best bet. They have been VERY quick to offer refunds for me in the past, sometimes within less than a day of picking the item up from an Amazon locker.