Airtel — unable to connect network after mnp

Hello,

I have opted for porting my number from vodafone to airtel. I had received my upc and it got successfully processed on 20-feb-2018. I received an sms saying my porting will take place on 20-feb-2018 at 11:40. Now after my previous network is gone and i insert the new airtel 4g sim card in my phone, i am not being able to make outgoing or incoming calls on the new sim (Nor even on the old sim). I am stuck without any network connection in my number. This is absolutely a nightmare and a situation that cannot be accepted.

I am even unable to proceed with my televerification. Please look into this urgently.