OP, no offence but your post quality is really poor. What he said is right, he didnt have to leave you negative trust but that is his choice. If you improve your post quality & send him a PM maybe he might remove it.
I sent him PM 2 times. He left a negative feedback as I was seeking for buying an account. I didn't know that even asking for an account I could get a negative feedback while account buy/sell is allowed. So, I sent him message saying that I realized and will not do it again. But?