CraigslistAdPostingService.net Adil Zafar Didn't fulfil their end

This company contacted me to hire me as a freelancer to build their platform.. I built it, everything was fine. Then Craigslist made changes, I was much to busy to make a software for them again, but they kept hounding me. Finally i agreed, after waiting weeks for them to give me the items I asked for so i could build it, they claimed I was taking too long. Unfornately this wasn't the first time this had happened with them. So rather then keep dealing with the insults I gave him a refund. He proceeded to call me insulting names and be rude. A few days later he tried to apologize. I said okay 30% of what my software makes you because the low ammount they wanted to pay and the headache was not worth my time. He said I can do 20. The guy is making 15,000+ on my software a month.. He wanted to pay 500 dollars to have me build a custom software.. Not going to happen. He proceeded to insult me saying I was greedy. I'm not greedy. I don't do work for people who insult, rush, or underpay. Sorry not going to happen. I would advise staying away from this company as i was the one doing their automation which they no longer have.