Item not delivered

I bought a Huawei E5330 modem on the 4th of January 2016 but my item still not delivered, and I don't get a clear answer when I ask about it. They keep saying they will come back to me. They promise to deliver 2 to 4 working days but now it is a 3rd week I have not received my order. I will never recommend a person to buy from them.