Wait until it's dark..... get a ski mask, a tube sock, some duct tape and................ just kidding!

I would have one more conversation with him. Face to face so he can't just hang up and let him know exactly how you feel. Speak you mind and if he wants to take it to another level so be it.

Never buy anything else there. and let all of the people in you community know what a dirt-bag he is. He will end up paying
the bigger price.