Issue with my first avatar trade – looking for advice

Hey everyone! I’m new here and just had a really odd experience during what was supposed to be my first avatar exchange. After posting an LTT (Looking to Trade) for one of my avatars, someone DM’d me with his OpenSea link and proposed a swap for one of his. I found an avatar I liked and mentioned using ampule.io for the exchange. Since my account is new, I explained that the official Matic faucet wasn’t working for me (it kept throwing an error: ‘No vault address found’), and I asked if he could send a little Matic to cover gas fees. He agreed to send the Matic but claimed ampule.io ‘doesn’t work anymore.’

I thanked him and asked if he could guide me through the process, since he seemed more experienced. But seconds later, he suddenly changed his mind, said he no longer wanted to trade, and blocked me. Honestly, I’m confused and found this pretty rude. Has anyone dealt with something like this? Any insights would be appreciated. Thanks!