I went to a junk yard and they wont take them off the rims they said I have to or I have to buy the whole thing!

I went to pull apart today with my husband and its a do it your self place and they wont let us drive in there and we took the car and lowered it lol he did it all mostly but it wouldn't come loose. They are 9 dollars a peice and 15 with the rim and I dont want it lol I thought I'd just ask where to get the parts thanks guys