Nonchalant response to missing valuable item

We have been staying with the hotel for 4 nights now and had not experienced any issues until we noticed that a personal item from our room had gone missing an item that housekeeping had not taken ever since our first stay. We did not leave the hotel with the item nor did we leave the room with the item moreover we have asked the housekeeping manager to check the CCTV footage from the ground level elevators in order to prove that we did not leave with the item. We are unhappy with the hotel's response, the lack of urgency is highly disheartening. We are not comfortable having our room cleaned without supervision. We constantly have to follow up the hotel for feedback otherwise nothing is said to us. I would advise future customers to lock their personal items away and not keep them where they can be seen because should they go missing the matter will not be taken seriously and with any urgency. Keep your items safe because it's not worth all the trouble or book a different hotel.