$550 cash stolen at Security check

Last night around about 1:10 AM my Rv went through security check and my whole group stepped out with all our belonging left in the RV. I had my cash in my purse right before we went through the line and as we stepped back onto our RV to go into the fest i was gathering all my belongings as it was just left as mess everywhere. That’s when i noticed roughly $550 of my cash was missing with the bag it was in on the ground. The team that checked my RV was searched and i was told it was not found. I checked my RV countless times to make sure i didn’t miss it. I filed a report with the security team. But now I’m unsure of what to do or what steps to take. The 2 girls checking our RV kept asking if we could leave them beat boxes/ cut water for them to take. The whole thing was sketchy. I hate to be quick to blame any one but i literally had my Money with me right before we went through the line. This was 6 months of me saving up for me to have cash to spend here. I’m heart broken this is my first forest experience. It sad you can’t even trust security who is hired to keep the festival a safe and enjoyable space.