Airtel — airtel landline

Address:

Ernakulam, Kerala, 682030

I filed a complaint regarding my landline provided by Airtel, reference # 88857986 on October 10, 2017. The issue with the phone is that I cannot receive any call on my landline from from another landline telephone, either STD or ISD. The service technician called at my residence but said that the issue is with Airtel backend. Airtel customer care stated that the issue will be under observation and will be resolved. Till now the problem is not cleared and I find this issue very frustrating.