Postpaid — What is the reason to disconnect my No.

Address:

Bangalore, Karnataka

Dear Sir.,

Name: Krishna
No. [protected]

Sub: My phone as disconnected. What is the reason

This is krishna here my mobile No. [protected] last 20days back this no. i have converted from Prepaid to Post paid. and on that day i have handover my all documents(ID Proof) and 300/- Rs to person name Shiv([protected]) who as come and give the Sim card. But now today out going calls are not going please check this process. What i have to please tell me the solution. can i convert to Prepaid or continue the postpaid service.

Thanks & Regards

Krishna