Sorry to hear about your issue with your Realtor. You certainly can fire your Realtor if they are not doing their job.
You should request a meeting with him and ask him to show you his paperwork that has the information about your home on it so you can see where he got his information. You can also get the chance to speak with him and listen to his reason.
If you simply do not want to talk with him and you have proof that he was not doing his job then you can give his broker a call and tell him/her that you want to fire the listing agent. Keep in mind that the listing agent does not own your listing. The broker does. Even though you met with and hired the Realtor, it's not his listing. So, you actually need to fire the broker.
After speaking with the broker, write a letter and mail or fax the letter to the broker explaining why you want to fire the broker and what date the termination begins. If you plan to relist with another broker, make sure that your current broker doesn't have a clause in the listing agreement that prohibits you from relisting with a new broker for a specific time period.
I hope this helps and if you have more questions, feel free to ask.
(215) 669-0589 Direct
(215) 358-1100 Office ask for Renee