Get her a playpen so she can play when you don't have time to watch her like a hawk. That's what I did for Gretchen. I put her in her playpen and when I am done with dinner, etc. and I can watch her closely, I let her out. Keep a squirt bottle next to you and squirt her when she starts to chew. Gretchen has learned pretty well, although I could not just her unsupervised.
How old is your bun? Gretchen is still young. I think she will settle down a bit eventually.
Some people just let their buns chew stuff up, but I'm too picky I guess. I love her to death...but I don't want her to destroy nice things.