Can I terminate agency agreement before it's running out?

I have some legal issue here, I think. I had signed an exclusive agreement for 1 year with an acting agency about a month ago. But since then, they never contact me about possible jobs or whatsoever, not even invite me to weekly meeting, but I know they invite everybody else, and so on. I therefore felt being left out and would like to terminate my contract anyway. Can I do that?

I have spoken to other agencies, and they say 1 year is too long. It should be about 7 days only, so that people could change their mind.

Any advice would be very appreciated. Thanks.

Buppha