Takealot not taking customer complaints seriously

Bought items from takealot and delivery date was 29th Nov. Later when I checked on the App delivery date changed to the 8th December. I contacted Takealot and advised them that I need items delivered before the 2nd as I need to use them for a function. They told me that they will cancel items delaying the order and the rest of the order will be delivered on time. They still did not deliver on time and they cited that they cant cancel order since I already paid and can only return items once received. Items arrived o the 3rd of december and I requested for a return to be logged and for a refund. Items were returned and their original packaging and little did I know that they will return one item opened and re-packaged by takelaot and they said they cant refund me. I raised a complaint with them and at this stage its not resolved yet as they keep asking the same question in order to pass time even though the information was supp**** in the original mail. I expressed my dissatisfaction and they still not willing to do the right thing. Its been weeks and the don't update on the progress unless I write to them and they keep asking the same question over and over again