Dhl cost me R11 000. Unprofessional agents laugh

Dhl is the worst courier service you could possibly get. I have lost out on R11 000 due to their incompetence. They delivered my packages late, the packages had items missing.

I called to get a certificate of loss so I could submit a claim. I explained everything, I told the lady I work in a risk environment, I can't answer my phone. She said it's fine, in 2hours everything will be sorted. She said I'll be contacted via email, I'll be given reference numbers and so forth.

It's been more than a week now. I have missed the deadline to submit my claim. I called again, I was told my query was cancelled. Nobody cares for customer service there. R11 000 is not small change. The guy I'm speaking to says he'll have to start over. When I explain to him I had already logged this issue, he keeps telling me it was cancelled.

I have to take unpaid leave every time I want to contact them, nobody cares about the money I have lost. Who will compensate me now? Dhl are unprofessional and do not care to correct mistakes.