Lindy

So I am trying to download the photos - some have arrived on the page others I have the little wheel spinning madly and nothing happens - if I reload a photo I get a message saying it is a duplicate and delete the original - but I cant because I cant see it -  On my website there are some photos and the rest are "invisible" but if you click on them you see them - My main photo is not showing on the site - how do I sort out photos please?  Causing me a big headache and spending far too much time doing what should be a simple job.  Thanks for help