Beyond furious customer of Toy Kingdom

I ordered from Toy kingdom online on 4 December and I still have not received my parcel. All they tell me via e mail is that it's with their delivery service and I must track it. Their delivery service does not answer their phone or reply to e mails so there is no way for me to find my order. I have asked toy kingdom via multiple e mails to help me yet they don't. It's almost a month since I ordered and paid yet I have received nothing.