Samsung A5 lost in 3Arena

My girlfriends Samsung A5 went missing on Friday 1st March at the 21pilots gig at the 3Arena. Its a gold Samsung A5 with a clear rubber case on the back. Its got tonnes of pics and vids of the kids on the sd card. She's devastated. We downloaded find my device on my phone and it said her phone was still out there on saturday. We've been in touch with people out there and they've been very helpful but nothings turned up. Please if anyone found it let us know please. Thanks.