WORST ONLINE SHOPPING SERVICE EVER!

I have placed an order on the online shopping site on 3 Dec 2018. The indicated delivery time for the order were supposed to be 10 to 15 working days. On 27 Dec 2018 the 15 working days expired. On 31 Dec 2018 I emailed Zasttra to ask when I will be receiving my order via email, on 4 Jan I resent the email asking for a reply on my mail. Only then did i receive a reply from Shaun Parker, given that I have provided the incorrect order number on my first mail...I rep**** with the correct order number on 5 Jan. On 8 Jan Shaun rep**** saying that i have a choice to cancel the order and get refunded, or get refunded on a credit basis with 25% discount on the next order. On 14 Jan I emailed back and cancelled the order with the instruction to refund me in full. I am still waiting for a reply and refund. I have called the company on 21 Jan as well asking to cancel the order and refund me, the operator rep**** that he cancelled the order and I will have to wait for the finance department to refund me. When I requested to know how long it will take he told me that when they receive the request it will take 5 to 7 working days. Today, 25 Jan, I still have not 1) received an email from Zasttra to say that my order has been cancelled, 2) my order on their site is still "processing" and not indicated as "CANCELLED", 3) I still have not received ANY refund, or 4) any satisfactory reply form Zasttra or Shaun Parker.