Crew from British Airways stole 2 weaves from my luggage

I am furious, disappointed and frustrated as on 24 April 2021 I had bad experience with British Airways crew, flight BA 6306 from King Shaka Airport to Cape Town Airport, someone took my two expensive weaves from my luggage, I realised when I picked up my bag that it wasn't closed the way I closed it, only to find when I opened my luggage the weaves were no where to be found. a lady who was assisting us to check in Durban saw the weave. I will not rest until i get my weaves back