how do i cancel an auto ins policy?broker was dishonest about what i was signing, policy 1 day old, help?

broker gave short description of each page before signing, got home, read each page throughly, (what i should have done in first place)and find out i was signing for membership in motor club, , fee was added into quote, said pymts were lower if debited from ckng acct, find out $5 fee added onto premium, every month