Best case scenario:
1) Pay rack rate in cash for 14 days. Points payment not allowed.
2) Pay it on a credit card. Then dispute it once you are safely repatriated. The credit card company rules against you because you occupied the room. You get sued by the CC company and get a judgment against you which leads to bank levy and wage garnishment. If you don't show up at a debtor's exam or provide evasive or misleading answers to avoid paying, judge rules you in contempt and you go to debtor's jail in the US.
Worst case scenario:
You are a points blogger without a real job so you have no substantial cash to pay rack rate. You are quarantined for 14 days and there are no flights out. Points/miles redemption not allowed. Debit/cash only. You don't pay, you get blocked by immigration and go to jail. You ask for your one phone call to the embassy and the prison guard says there is no such thing. You find out later from your embassy that you got canned from your job because you abandoned your position (if you're not a blogger).
Don't go unless you have deep pockets of cash. Not points. Not miles.
I guess you could cancel the credit card before they had a chance to authorise the additional nights stay. Not much the hotel could do if you reside in a different country (would be extremely costly to try and collect)