Really disappointed that you weren't truthful with your feedback. You were definitely the one who didn't respond. I've very easily communicated with other buyers so it's unlikely a bug with the app. Carousell also lists how active a person is and whether a message has been read. Given that I left you negative feedback and you responded immediately, I'd say the app works fine. I think you have remorse from the review I left you and decided to take it out on me. Also your offer was below asking.