Not entirely applicable in this case, but I had a similar situation with Google (they claimed I owe them money, no way to actually pay, let alone challenge it).

Not entirely applicable in this case, but I had a similar situation with Google (they claimed I owe them money, no way to actually pay, let alone challenge it). Eventually it went to a collections agency who do have humans working for them, did reply and cancelled the 'debt' immediately when I provided evidence. Google, Facebook, etc might not want to talk to their customers. But adjacent companies might.