NOT really getting along with my re agent, am I still obligated to him?

[James Willson]

So long story short, he was my seller's agent, at that time, I was little hesitant to sell the commercial property because I didn't like some of terms that buyer wanted. Then my agent started threatening me that even I don't sell my property, I would still owe him the commission because he found a willing and able buyer who is willing to pay my full asking price.
I'm sure he could convince/persuade me in a better way than saying, "you owe me my commission no matter what!"

At the end, I did get the property under contract and now waiting for the closing date. I asked my agent if I could pull the closing date to earlier. He confirms it wouldn't be a problem. Weeks later, he says buyer can not close the deal any earlier than what the contract states. I asked him why he said yes before, he starts yelling and screaming that we never had that conversation nor it's his problem.

Now problem is he is also my buyer's agent. I did not sign any contract with him, only the agent disclosure form. He did show me a couple of properties and also came to showing. He also helped me making a couple of writen offer or purchase agreement, which was not accepted by seller though.

I know you guys work hard and needs to get paid when work is done.
But what my agent did so far or the way his treating me as of a client is not professional nor ethical.

I like to if I could just say good bye to him and find someone else without any problem.

Thanks in advance.