Need some good, reliable advice on my new guinea pigs?

We just purchased 2 female guinea pigs from a breeder. They are terrified of us and every noise around, all they do is hide all day and go nuts all night. I take them out once a day to "get exercise"and one cowers and goes into statue mode and the other one hides in the tube i got for playtime) I try to snuggle them so they can get use to me that way, and one goes nuts and the other one just sits there like a bump on a log shaking. Also, They have barely make a squeak or peep since we got them and I thought they made lots of noise.....they won't eat the fresh fruits adn veggies i but out for them either........ I feel like we are doing something wrong.