Can I request to close a card so that there are no more changes?

No. That isn't possible. Otherwise, everyone would have opted for that option. You have to either repay the balance in full or settle it before closing the credit card. You can contact a good debt settlement form to do the negotiations and settle your credit card. Otherwise, you can ask Chase if there is any hardship program. You can use it to pay off the credit card.

You can close the credit card from a remote location. But you have to repay the debt. Otherwise, it will stay reported and you might face problem the next time you do any financial transaction in the US.

No you can't close the card before you pay off the balances. Pay of the balance first and then close it. You may take help from a good debt settlement firm and settle your debts.

It is better to settle the debts. If you ignore the debts or close the credit cards without repaying the bills, then it will be reported on your report. You may get collection calls. So, you can enroll in a settlement program to get rid of them