Looking to delete a background and/or image

Hello,

I’m looking to delete an image that’s stuck right behind another, but is not the ‘background’.

I use the The7 template (7creative), it has this fancy planet-like arc going on. I placed another image on top, which fit my corporate identity better. However, this default image is still stuck behind my own and it tends to peek out when I scroll on my PC. (See site) (This site is not responsive optimized yet).
I tried changing the background, but to no use.
The box technically can be selected, it outlines the full image, which is ever so slightly large than the image I included, however, when I delete it it deletes my own image, not the one behind it.

How do I remove this this image?

I’m sorry, what?

Contact the item author for the support. Forum is general purposes but not for support requests