Citizens Bank review: Mortgage 1

I have $1M in equity in my house, my business was devastated, forbearance during Covid, accepted modification, and paid the 3 payments considered probationary to make the modification permanent. About 45 days later, I received a check back from the bank with a note saying it couldn't be accepted - no reason at all. Just a one-liner to appeal, which I did, and then I called and emailed incessantly and nobody responded. The only people I could get were in collections, and they couldn't do anything. Then the intent to foreclose letters started, I had an attorney (loan modifications, not a litigator) on the phone with me, and they agreed to forward all information from then on to the lawyer, which they didn't do. This went on for 18 months until they filed for foreclosure. I've been fighting it since, and I'm up to $16,000 in legal fees, and my credit has been destroyed (780 to 560). It's a principal thing. I'm beyond being upset, worried, etc. It's changed me as a person. It's impacting my marriage, my family, my business, and now my health. I don't know what to do. Why not honor the modification?