I have order a quardcopter on date 17/1/2107 and it's tracking number is
ITEM n° EH000541006SG new search
Local Date and Time Country Location Event Type Mail Category Next Office Extra Information
1/23/2017 5:45:00 PM Singapore SINGAPORE EMS Receive item from customer (Otb) Air KOLKATA EMS SPEED POST CENTRE
1/23/2017 5:55:00 PM Singapore SINGAPORE EMS Receive item at office of exchange (Otb) Air KOLKATA EMS SPEED POST CENTRE
1/24/2017 2:31:00 PM Singapore SINGAPORE S02 Insert item into bag (Otb) Air KOLKATA EMS SPEED POST CENTRE
1/25/2017 9:00:00 PM Singapore SINGAPORE S02 Send item abroad (EDI-received) Air KOLKATA EMS SPEED POST CENTRE
1/26/2017 6:46:58 PM India KOLKATA FOREIGN EMS Receive item at office of exchange (Inb) Air KOLKATA EMS SPEED POST CENTRE
1/26/2017 7:14:21 PM India KOLKATA FOREIGN EMS Transfer from office of exchange (Inb) Air CED KOLKATA
1/28/2017 4:19:07 PM India KOLKATA FOREIGN EMS Record item customs information (Inb) Air CED KOLKATA
Retention reason : Retained by customs for unspecified reason
at last its is retained by custom for unspecified reasons so is it normal or i have to contact the office and if yes then please help me out .