Bad service and no delivery

I made an order and did a full payment. The scheduled delivery date for my order was 26/11/18 and an sms came saying the delivery date is now going to be 28/11/18. My order still hasn’t arrived and I keep calling to find out what is the hold up but no one has a straight answer. I ordered the things I needed earlier because I need to use them for a specific date but I still haven’t received anything. I am very disappointed in the service that I am receiving from Superbalist