shulker box gone :/

[SolarMagic23]

hi!

I don't know if anything can be done about this issue but I'm kinda disappointed.  I was building on my server and I needed more blocks so I placed my shulker box down to grab more blocks.  It was named "glass time," it was blue, and it stored mostly glass.  I'm working on a large dome so I need a lot of glass.  After I placed it down I was kicked for flying which happens sometimes so no biggie.  I go back on and I'm reset back a bit and I look in my inventory and the box is gone.  It wasn't where I placed it either.  I lost a lot of glass as well as an efficiency V, unbreaking III, and fortune III diamond shovel.  I don't know if anything can be done about this but if there is I'd love to try whatever I can or get whatever feedback I can.  Is there any way possible to get it back?  I included an image of it in my inventory, sorry I don't have a picture of myself holding it.  I hope it's enough proof that I really had it.

 

[notminehut]

Your only option would be to get this back using creative mode.

Make sure you're opped, /gamemode creative.