I live in a small condo building with 35 units. We have two separate yellow pages companies leave nearly a pallet full of books at our place. I'm talking like

I live in a small condo building with 35 units. We have two separate yellow pages companies leave nearly a pallet full of books at our place. I'm talking like 200+ pounds of paper. Nobody in our building wants them, they go straight in our recycle bin. We have tried many times to get off of their list. I would love to know how to report them for littering or something. I hate these companies!