If you did not get the Aadhaar card, contact UIDAI and find out the reason for the same. If you registered your mobile number when enrolling for Aadhaar, you can visit https://resident.uidai.gov.in/lost-uideid and retrieve your Aadhaar details. You can also call UIDAI at 1947 to find out the status of your card. Alternatively, you can visit any Aadhaar card centre in Mumbai and find out why you did not receive the card. Whatever you do, do not reapply if you have already done so once.