Hi,
I don't know if you're on Facebook but there are two Inquiry/Feedback groups that I read regularly where you can share this info. "FBI - Feedback and Inquiry" is one of them, and the other is "Herp Industry FBI: The Good, The Bad, The Truth". Both require proof (e.g. screen shots) to create a post so people can't make unfounded accusations.
Also if MM really did delete your negative feedback from the seller then that also should be stated, as a lot of buyers rely on the feedback when deciding to make a purchase.
You can also post a review on FaunaClassifieds.com but only as a response/reply to an ad that this seller creates, not as its own original post, and he hasn't posted an ad there in six years.
At least you got a refund. So sorry this happened though!
bcr229