American Express Amex Membership Points Ripoff Fort Lauderdale Florida

I have a business Amex card that I have accumulated over 800,000+ miles on.
In January, I transferred over 400,000 to Delta sky miles. Approximately 1 month ago, I looked at the Delta sky miles account and realized that the miles were never transferred and showed that the transfer was pending on the Amex membership rewards site. The problem now is that our business is in the tanks and our account has been put on a payment plan and is temporarily inactive. I called and told Amex the situation and asked to transfer miles immediately. I have been given the run around and have been told they will not honor the previous points until the card is paid.

I have spent well over two million dollars on this card, not to mention over 15 million through merchant accounts at 3.0% that my business runs through.

Can they legally pull back points that have been paid for and accrued over the last 3 years?

Is there any legal course of action I can take?

Japesurf
Newport Beach, California
U.S.A.