Casher stole my R800 and they claim camera is not working

On the 9th sept i went into shoprite devland and the casher stole my R800 when i turned to take more drinks .I spend over 3 hours at the store yesterday requesting footage no one was able to assist me . The manager of shoprite promise if i come today she will have it for me .On the 10 th i went back and guess what she said she cant see me paying or at the teller , i then went off at her she went back into the control room come back saying she can see me now however the camera went off . I requested for the to speak to the executive was told his our i left my details still nothing . sad we cant be safe when going to the shopping centre in the store i want my money