Depends on your buyer's agreement with the agent.
However, you say you "did not find her trustworthy." That's not enough to go on. It's possible, on the one hand, that she was nearly as much in the dark as you while the process was going on. That's very typical. On the other hand, if she was forging your signature or submitting offers without your approval, then those are serious issues which should be brought to her broker's attention immediately.
Speak to your agent to try to resolve the problems. If that doesn't work, speak to her broker.