Goods ****** from courier box

About 2 months ago I purchased a delivery box from the engine garage , which is supp**** by the dsv couirer services I had placed lv hand bags in the box and placed it in the drop box they have provided , I run a online business and my customers do efts for me and I send out orders , upon arrival to the customer she noticed that there was on 1 hand bag in the box and not 2 , I lodged a claim with dsv management and was told to submit a claim form , after submitting a claim form 2 weeks had past and I got no reply from them , so I called in , when I called in I was told I could not get a full refund for the item that was lost but could only get 250 rand which I find it so unfair because my customer had paid 1350 for the bag and she paid for courier services , now I have to run a loss and deal with a big rate customer also , pay for a new courier to transport the bag to her , I am utterly disgusted that dsv has such dishonest people working for them because this bag was ****** while in thier property , I will no longer be using their services and will go back to using Aramax as they are much more realible than dsv , unhappy customer