Sorry if this is the wrong section and sorry that it's a stupid one.
I found a seller through a group chat, not a marketplace. He had a sheet of sites, the metrics looked reasonable, the prices were about 30% under what I'd been quoted elsewhere, and two people in the chat vouched for him. I paid 940 for six placements on the 9th of January. In crypto, because that's what he took.
First two weeks he replied same day. Then it became every few days. Then "waiting on the editor". Last message from him was the 3rd of February and nothing since. Not blocked, the messages show delivered.
I know the answer is probably that the money is gone. What I want to know is whether there's anything worth doing at all, or whether people just write it off, and also whether the two who vouched for him are worth asking about because I don't know how these things usually work.