Did you try to get it verified? There should be a way to open a verification popup and put in the card details again and sometimes they give you a text box where you can describe your issue as well.
I had this exact issue on one account no more than a month ago. Kept getting only automated response and account remained suspended. I thought it was toast but came back weeks later to remove all payment methods and added them back (same card btw) and then it "just worked". There was no logic behind it, just Meta being retarded and unable to come up with a system that doesn't contradict itself every time more frontend bloat is added.