[Resolved]  Unknown Caller — Frustrating blank call and message

Address:

Chennai, Tamil Nadu

Getting a lot of blank calls from this no. [protected] almost15 to 20 times a day. When am picking they don't answer, its really very irritating. This caller picking call from other no. when my friends calling from different number its picking but not speaking properly. Its sending some stupid abusive message, Please help i don't know this caller. when checked in mobile traker its showing Aircel connection of Chennai, Tami Nadu.