on 01-19-2022 10:34 PM
I had similar thing happen to me a while back. If you go to Block Buyers page (not the list of blocked buyers but the page link itself) lower down on the page is "Don't allow blocked bidders to contact me", this will stop anyone you've blocked from contacting you THROUGH YOUR LISTINGS, however if you've already messaged him back he can still respond back using your message as the way. He won't however be able to bid or shouldn't be able to contact you on any new listings. Once done just resist the urge to message him back if he keeps trying and eventually he won't be able to reach you once messages expire.
I don't know if you can report him for this, I think blocking him is the way.