Unfair treatment of customers and exploitation

I purchased Clothes from Zoppah on the 28th of August and I paid for DHL shipping which takes a maximum of 7 days, it's the 7th of October today and I still haven't received my package, I paid a shipping fee of R1500 because I was expecting my things in September but I still haven't received them, sea shipping was R300 and it takes a month, now my air shipping took a month as well and they told me they have complications with DHL and they've transferred me to FedEx and now I'm expected to pay another R845 on top.. And my friend bought from them and had no additional fees and she got her staff within 2 weeks. I haven't been receiving updates from them I was begging them for updates all they said was the Chinese are on holiday, and they are waiting for waybill, I had to do my own research and I found out that my things are in Joburg with the FedEx company waiting for the payment of R845