Netflorist bad service and refunds are almost half

I made a Netflorist order for delivery on 13 Aug. The delivery was still not fulfilled till 20 Aug. thereafter they promised to refund my order . Refunds were made on 21 Aug of R500 . Please note the amount owed by Netflorist is R985. A surprise gift to a loved one has become a stressful situation with calls emails and chats constantly to Netflorist agents. This is all at my cost. Why don’t they just go out their mistake a pay the amount of items. It stated clearly on the receipt. They offered me a R100 voucher in late delivery which I refused . Now I just want my dues that is owed to me

*** That is the delay delivery ref number