My service is been ok, I'm not completely satisfie...

My service is been ok, I'm not completely satisfied with it, but I already signed a offer/contract with my current realtor. It feels that it's very hard to get an appointment with her to go see houses, she always has an excuse of why she can't, so I have to wait until she is available. It makes me feel like I'm not a prioritized client for her. If there is a way to change realtors please let me know. Thanks!