Terrible customer services - why are you ignoring your clients?

I have bought a product online that was not delivered. The online status says 'with courier'. It has been more then a month! Four emails later - NO RESPONSE!! Three phone calls later. Promises to investigate and call back and nothing happens. No information, no refund, NOTHING. Why are customers services blatantly ignoring its customers? No response on FB either. It is impossible to get through to the company.