Hello WP support...
I'm sorry you are getting dragged into this. The owner of the above site has filed at least a couple DMCAs, which I've gladly complied with. To my knowledge, there is nothing I've posted in the past several months that would be considered "used without his permission". I've asked the owner of the above site to contact me if he thinks I have improperly used any of his content without permission, in which case I would be happy to fix it, and he has not done so. Obviously, if I'm not aware of a problem, I cannot rectify it. I honestly have no idea where I've "persisted in doing this", as he says, since the DMCAs.
If there is something I've posted improperly without giving proper credit, rest assured it is simply an oversight on my part, and I am happy to correct it without the involvement of WP support, which I am quite sure has better things to do than to referee a trivial, childish spat. All he has to do is alert me, and he and I can work out whatever issues he might have, I'm quite sure, without wasting anyone else's time.
Sorry again for taking your time!