India Post — Post not getting delivered at my address

Address: Mohali, Punjab, 140603

Dear Sir,
I have applied for my PAN card with Income Tax office in July.16. They have dispatched my PAN card on 19/08/16 but Zirakpur, Mohali, Punjab-140603 postman returned it to ITO with reason address not traceable.
I have my aadhar card issued on the same address and the same is very much traceable. I have ben receiving my couriers and even my aadhar card delivered at this. My address is-
Flat no. 804, Tower I, Maya Garden Ph-2, VIP road, Zirakpur, SAS nagar-140603

Would request you to please look into the matter as because of this laid back attitude my important document is not getting delivered at my address.