Delhivery — Not delivered order since 4 days

Address: Mohali

My order arrived at their office mohali on 3rd feb. Today is 6th. The packet is lying their since 3 days, they have not delivered yet. This is smart city, we cannot expect such a pathetic service from any courier company. They have created such a mess. And the main thing is they do not have any contact number of their mohali office, there is only one customer care number which never connects. All i have to say is they are WORSE and now harassing me.