theft at the Gallery restuarant

i recently booked in at the Gallery in Queenstown on the 18/09/19 and out on the 19/09/19. Around 16H40 i called the Gallery and ask if any of the housekeepers have reported found sunglasses (Oakly) that i left in room 11, and i was told none of the housekeepers have reported any found items. on the day in question 2XHousekeepers cleaned the room. I am 100% sure one of them moved my sunglasses and unfortunately i had to open a case of theft not against the Gallery but it's employees