Airtel — airtel: not getting any incoming calls outgoing calls working fine

Website:

www.airtel.in

I am not receiving any incoming calls since last 4 days. Outgoing calls are working fine.

When ever someone is calling me they are getting a message "call cannot be completed, please contact customer care"

I have contacted customer care support but they always says within 24 hrs your problem will be resolved, but it never gets resolve.

When i visited the service center for this issue they swapped the sim card and said it will resolve the problem but even after swapping the sim i am not receiving incoming calls.

This is very frustrating.