No customer service with online purchases!!

I placed an order on the 4th of November 2022. I haven’t received any message about the shipment. On their site, they state that they deliver within 2 - 4 working days. I’m so disappointed with their service. I contacted them on the 13th of November 2022. They gave me a waybill number and told me to follow up with Dawn Wing. Checking on Dawn Wing and they can't locate my package and the waybill number does not exist. So I contacted them again without any success and they keep referring me to the courier company with a "****" waybill number. What should I do?!! They should clearly sort this out and not let us going backwards and forwards like clowns. Their customer service is non-existing and they clearly don't care at all!!! Never again.