What are my options

This is a vent and a call for advice.
The hospital I am currently at just hired an RN that has been away from the bedside for some time. She was given four days orientation. She and I worked together two nights last week, after the weekend I spoke with the NM and explained that I didn't feel safe working with her and requested that she not schedule us together anymore.......the reasons for this request: she sat and watched her pt's sats drop to the 80's and didn't do anything about it....she visibly got her back up when I tried to explain some things to her that she wasn't understanding....she doesn't understand very basic nursing concepts or have very basic nursing skills......all neatly written up and verified by a third nurse. Well, I come back after my days off and she and I are working together again. This time she reports to the oncoming shift that she had been giving medications through an IV that she is sure is not good any longer (?) and then I later find out that her pt was experience CP, was diaphoretic and pale and she did nothing about it, when days came on they checked a troponin and it was .54, and of course he was admitted. Once again, I spoke to the NM, I truly believe this person is dangerous and I do not want to be working with her.....now the new schedule is out and I am working with her every weekend. I will be calling my agency in the morning and getting them involved.......my ? ....can I get out of this contract? I am not at all comfortable working with someone that I feel is dangerous, and I don't want to work at a facility that doesn't seem to care enough to get this nurse proper training or supervision.
Am I being too hard and can I get out of here?