That's a very huge amount but have you exerted all your efforts this should be a big concern for the Crypto community why not reach out first to big Crypto media like Cointelegram and ask an audience to publish your issue or story if your funds are clean they need to refund, it will help others who like to trade with a huge amount not to pick Exodus if they failed to act on what they promise, then suing them is the best option.
I think a demand letter from a law firm will force them to act on their promise.