Waiting For My Lens

I ordered the Sigma 150-600mm F5-6.3 DG OS HSM ( S ) lens from Amazon on Feb. 24. Almost 4 weeks later and they don't even have an estimated arrival time for it. And I can't find anyone to ask at Amazon. Frustrating! We still have snow on the ground here and are supposed to get a few more inches today, so I really don't need it yet, but I'm getting spring fever and very antsy to get out to do some shooting with it.