Tried helping and a guy and he vanished. Want to return his stuff

I was crossing footover bridge near Innovative Multiplex and saw a guy in early 20s struggling to lift a box and almost falling over. He seemed to be in a rush & even threw his chelsea boots in the box to be a bit faster. I offered to help him and he asked me to drop the box downstairs. As soon as I reached down, he was nowhere to be found and the box had his stuff including his shoes, protein stack, switchboard, shaker etc. I waited for half an hour and asked around but to no avail. I am feeling super guilty now and in case the guy is reading this, bro I haven't taken anything and all your stuff is with the shopkeeper below the bridge. Please collect