Strange interaction when trying to sell gold

So last night I reached out to @Runerealmgp about selling a large amount of osrs gold. He seemed happy to buy it and offered me a good rate $0.172/m. I asked to use a middleman, he asked who, I sent him a link to Dzeny (https://www.sythe.org/threads/300-donor-dzenys-middleman-service-2-5-fee/). He replied there are other free mm, I said it's fine I'll pay the fee. He never replied and then a few hours later banned me.

I haven't sold gold before so I'm not sure of all the protocols, did I do something wrong?

 

Only trust middlemans that are trusted within the community. The real Dzeny is a trusted person and does great work. Be careful with who you trade on here.