Builders Warehouse Nelpsruit Refusing to Show Footage

I bought a COSY Sliding Door Railing from Builders Warehouse Nelspruit and 3 Doors. Got home to find that the railing was missing. Went back to builders to ask to see footage from the loading bay to see if we actually loaded it into the car and they refused to show us the footage stating that only police can see the footage. I find this very disapointing considering that I recently bought a lot of material from them and now that I lost something they are refusing to assist in me finding it. From a customer service perspective I am disapointed. I have gone to many shops before where I have asked to see footage and they have assisted me. So if builders is to review this, my only ask is to see the footage myself so I can certain that the railing was not left behind at the loading bay where I collected the doors.