Have a conversation with the listing agent, outlining why you want to take your home off the market. If there are other issues or conflict, contact the broker. The listing agreements are contracts with specific end dates, and it may be that the listing agent will release you from that contract- but it does take the broker's signature to do so. Make sure you get the release in writing. If they are unwilling to release the listing, then request that it goes into a withdrawn status- it effectively removes it from the market, but during that time, you can not list with another broker(until original listing has expired).
Hope this helps! If you have further questions, feel free to contact me.
Coldwell Banker All American
serving the KC Metro area