Deal with it the same way you would back home... Send very big, dangerous, violent, criminal men to his house to recover the funds. No justice system will help you with this unless you have a formal written contract.
Data from government and fake news media which have categorically proven to be untrustworthy time and time again are not reliable.
The definition of covid death was deliberately changed to push the count higher, it's what's known as a manufactured crisis. I'm sorry if you believe you lost a loved one to covid, but it's more likely that they died of other causes and the hospital lied. Try to be more open minded, I know it's hard with the brainwashing and reinforcement of the same artificial narrative.
If anything, covid itself is a conspiracy. As mentioned, I've never known a single person who's even been hospitalized. There's way more deadly shit out there, it's bizarre we focused on this one flu when there's a million worse health burdens to worry about.