No Delivery despite numerous phone calls

Ordered stock, paid but no delivery. Per their records delivery was due on 30 April. It is 13 May with no delivery. Phone calls are made to customer service on nearly a daily basis. They then apparently need to follow up with the delivery company and ask for a number to contact you on with an update. That does not happen. Requests to customer services to provide the delivery company with my contact details clearly also does not happen as I receive no calls from them. The delivery company will not manage to contact the person's whose detail were originally provided as he is now overseas (without the products ordered and required for his trip)<br> <br> How does one get the product from them?