Airtel — not able to make the outgoing calls

Address:

Kanchipuram, Tamil Nadu, 600 119

Hi,

One month back i changed my network connection as Airtel Postpaid to Airtel Prepaid.After chanaged, no issues in my network.More than one month exactly [18.04.18] itself there is no outgoing call in my mobile if i tried to call it shows Call ended.But i able to receive Incoming call and having internet connection.

On that day itself I call to customer care, they told there is network problem in our side and it will recover after 3hrs.

Next day morning [19.04.18] same issue exist.Again i call to customer care, they told there is a SIM problem so u can get the duplicate SIM and check it.

I get a duplicate SIM in Airtel store and checked.But same issue exist in that SIM also.Again i call to customer care but they not give a proper solutions.

I don't know what i do. Pls help?

I'm using Redmi 3S Prime mobile.