Package hasn't moved in 2 weeks

I ordered on the 29th of last month, it took nearly a week for them to shop my package it got to arrived at original terminal on the 6th and hasn't moved since. The delivery date has been and gone and they're refusing to refund me as they're determined the package will reach me by the 23rd (unlikely seeing it hasn't even left china yet). Is anyone else having the same issue or has anyone ordered around the same time and its been delivered. I'm in the UK for reference.