Usave Wolmarans Stole from me

I went to USAVE Wolmarans branch this evening, I had my gown on since they're just in the flat I stay in...the security told me that gowns are not allowed in the store which is something new to me...told me to take it off if I wanna go in...which I did and placed it infront of him so that he can keep an eye on it for me as I quickly rush into the store... forgetting my phone and USB on my gown ..when I was done on my way out I asked for my gown it was gone...he told me that he doesn't know who took it since it wasn't me who took it.... So I have lost 3 things because of a stupid rule of no gown allowed in the store.... nonsense I've never heard of in my life...I need my phone and my USB worse they were not even willing to check the cameras for me.