Airtel — no customer care support

Address: Airttel acorss Bangalore & India, 560020

We have lost our mobile number and wanted to block the SIM card .
Tried to connect Airtel customer care number 121 & 198.

Both number gives recorded message mentioning press 1, 2 etc . continuously and never accepts our input and comes out after some time that our number of tries over .
We tried for an hour from other mobile number . Very bad service from Airtel that is the reason everyone pulling out of Airtel.
Hope the Airtel management wakes up and provide good Customer care number in case of emergency