The first thing to do is to talk with the agent. Let the agent know why you're not happy. The agent may let you cancel the contract without any problems. if any of my seller or buyers are not happy with my services I wouldn't have a problem with them canceling the contract.
Buyers/Rep, then just talk to the Agent. If the Client wishes to terminate the agreement, then why would the agent bind you to the contract. Ask for termination, if denied by Agent, then speak to the Broker. Good luck.
Joe, are we certain that this is a listing agreement? I read, "Home Buying in Houston" at the top by the answer. My guess is that the agreement is a Buyers/Rep Agreement. You are correct about the listing agreement, we, real estates agents, must keep in mind, the listing belongs to the Broker.
Its only fair to try to resovle it first. If there is not a meeting of the minds you will need to ask to be terminated. It may result in you haveing to talk to the broker who may reassign it to another agent in the firm. If you have simply decided to not sell at all you can simply have it withdrawn from the market. Some agencies charge a fee for this so check your listing agreement.
If it is a buyer' rep. & you are not happy the service, All you have to do is put it writing like an email be honest and tell that agent that you are terminating b/c you are not satisfy. Hope this helps. Gratefuly, Carmen