You did nothing to warrant an attack. Please don't let one person sour you on the board. You got ignored 9 days, others for weeks... I think most were very sympathetic to your situation, commiserating even. Rescue homes should be valued, treated with respect. Reading posts here make me sad and angry. Even if someone wasn't a good fit for a dog I had, I worked with them to find a rescue that did. You asked for nothing unreasonable.
Good luck on finding your next dog. Please do also talk to camp basenji, have more options.