Please nuke any account that touches that answer or block the IP address.
There aren't any accounts associated with the IP addresses which have bee proposing edits to your answer. So there's no one to ban. The good news is they're getting their IP addresses rate-limited and blocked rapidly all on their own.
That said, I've changed the lock on this answer to a permanent lock. Not sure why it was only set to 1 week, as the problem would just start up again after that.