Ecom Express — Out of deliery from last days but still not delivered

My parcel has been showing 'out for delivery' since 23rd December. The delivery boy has been saying every day that he will deliver it the next day, but he didn't deliver it even by yesterday evening and now he is not picking up the phone. And today morning it is showing 'attempt restricted ofd lock'. Please resolve the issue. I need that parcel urgently."