Answer: If you aren’t getting the expected training, then your boss needs to intervene. However, you should exhaust all reasonable alternatives before involving your manager, and so far you haven’t done that.
Unless you develop telepathic abilities, your only options for communicating with Bonnie are email and phone calls. Saying “I refuse to talk to her by phone” not only sounds childish, but also makes you part of the problem.
If phoning Bonnie will produce the necessary information, then you need to overlook her unpleasant personality and make those calls. But if that strategy fails, it’s time to ask your manager for help.
For example: “Although Bonnie is supposed to be training me, I’ve had trouble getting information from her by phone or email. I’m worried about falling behind. Do you have any ideas for improving communication with her? Or could you suggest another trainer?”
By helping your boss recognize Bonnie’s coaching deficiencies, you may prevent future employees from having to endure such a long learning curve.