Not much more I can provide here. Realtors are basically unemployed between closings and every customer is a job interview and when we are hired we are expected to perform the job functions. What happens if you do not perform at your job? Usually you get a warning or two and then you may get fired. So you too can fire and rehire. It is common courtesy to work with only one Realtor at one time. If you have given your current Realtor sufficient warnings let him/her know right away in writing (email ok) that you will no longer require their services. You may want to CC the broker of the office. You can call the office and ask for the Brokers name and email.
Then you rehire. That involves interviews which could be an email contact, a phone call with 2-3 Realtors. Discuss your needs, area of interest and make sure the Realtor you choose has some experience in the area you are looking. Make sure the Realtor is FULL TIME and that they listen to you. A Realtor that does all the talking may not be hearing you. You can start here on Trulia, there are many good Realtor contacts myself included. I invite you to click on my name and email or visit my website for more information. I do wish you the best and I am so happy we can be of service to you here in this forum.