In order to recover deleted data from any Android devices including Micromax A102, you will need the help of Android Data Recovery Tool, if you do not have any backup of your lost files in some other places. The Android data recovery software help users to restore deleted, lost, missing formatted data like photos, videos, contacts, audio, contacts, text messages, whatsApp messages and other documents files. You can read more about this tool here – http://www.androiddata-recovery.com/blog/recover-android-data
After this you can install and try the trial version of the tool. The tool will scan and show you the preview of recoverable files. But in order o recover them you have to purchase the full version of the tool. Also note that once you lose, delete data or format your Android device, immediately stop using it, because overwriting the existing data with new data will decrease the chances of recovery.