Using my iphone to see attachment



I am a new user and i am currently facing a couple of roadblocks if resolved could enhance my workflow. I am a seller that has picture retouching gigs. So i need to download the images and work on them. I wanted to know a couple of things.

  1. Is there a way to access the attachments on my phone . I have an iphone with the app installed but it doesnt let me access the attachments or download them
  2. When someone purchases my gig, they sometimes dont send any images as attachments but my deadline starts. Is there a way to force them to send the images via attachment before my time starts?

Thanks for helping in advance.