Need help dealing with Amz

Ok, I’m at a loss…I want to delete the books I previously published with kdp so that I can create updated versions with my own ISBN and sell them only on my website, and nothing I’ve done has worked. It won’t even give me a delete option. I did the “unpublish” option weeks ago but my books are still for sale! I don't know what to do. Anyone else have any experience, advice or know where I can find answers? Help! Thank you!