Airtel — no network service of a new sim

Address: 761002

I had ported my no [protected] from vodafone to airtel. Porting was complete on 29 dec. I was using the airtel network until after half an hour, it displayed no service. And the network was gone. Customer care advised me to replace d sim which would take 4 working days to activate. I dnt have any alternate no. And it's my official no. Switching it off for a single day also can put my job at stake. Now i am regretting my decision of switching to airtel. And the airtel store people are not picking up my call.. Where i initiated the porting process. Kindly provide me with a solution whoever is reading this.
My alternate no is [protected]. Email: [protected]@gmail.com