Rude employee , missing items from delivery

I ordered some items from Edgars and delivery took place the following week, which was on Tuesday the 2nd of September. The parcel was left at reception with the receptionist instructing the delivery guy where to put the box, he did so and left. When I went to check it I found the seal broken half way, the receptionist who sits with our company security at reciption said the delivery left it there were he told do so. I then lodged a a complaint with the support Centre, I was told to send a picture and I did so, then I confirmed what was missing, I was then asked to send a picture of the item, I sent a screenshot of the invoice then she said she needs a proper picture, I then asked how do I send a picture of of what I didn't receive? . Then I was told that the box was delivered sealed, meaning that Ursula is implying that I am lying, when I asked her that she is saying I am lying she then says she didn't say that. I am very dissatisfied and angry to be called a ****. I want Ursula Smuts dealt with. She is unprofessional and rude to customers.