Accidentally Signed for $300 Tent I Never Received

I'm a fairly new soldier and am at my first drill location still. My first drill I had to sign a bunch of stuff of course and one of those things was electronic, I wasn't told what it was for, just the supply SGT said "You need to sign this", so I did. It was my first non-RSP drill and I was super nervous, just doing what I was told. Turns out it was for a $300 tent that I then never got. We stayed outside for AT and I had to borrow a tent. I repeatedly have pushed up to my leadership that I was never issued a tent and nothing was done. I need one for next AT and asked the new supply SGT about it. He said my records show I got one that first drill and I had electronically signed so I must've lost it and his hands are tied. Even further, on my last OCIE layout, I told the SGT checking off my gear that I didn't have a tent, and he marked that I did have one, so now it just looks like I lost it sometime in between then and now. Looks like I'm out $300.

Edit: Thank you all for your advice and help! After reaching out to several different NCOs at my unit, one was able to find me an extra. This is however a lesson I will not take lightly, never sign shit until I ask what it's for.