No customer service, imposible to get hold of a consultant.

I have ordered a TV from them three weeks ago and I was promised that it would be delivered three days later. I am still waiting for delivery. I can't get through to anyone on their contact numbers. The CEO, Adam sent me some e-mail apologizing for the delay about a week ago but is not responding to my mails anymore. What can I do to cancel this order? Worst service I have ever received from and online service provider.