Back in 2016, the Unique Identification Authority Of India (UIDAI) launched a toll free number - 1947 - to enable users to avail Aadhaar services through call.
UIDAI update: Fix Aadhaar card issues by calling THIS number - UIDAI said that all Aadhaar related issues will be handled via a single phone call from now. This number can assist you in 12 different languages.