AIRTEL India
Frequent service calls

I am a subscriber of AIRTEL.Using their sim for the past one year. But during the past few months i am annoyed with the daily service calls from AIRTEL with pre recorded message regarding "hello tunes" and "miss call alerts"

One call per day is inevitable. Call comes almost at the same time everyday, mostly evening hours!

I am also recieving frequent SMS regarding "FREE HELLO TUNE SONG DOWNLOAD" etc

Please help me regarding these unnecessary and annoying service messages and calls