Airtel — No services on my ported number

I ported my number from Vodafone to Airtel on 3rd Feb 2023 and it was yesterday (8th Feb 2023) at around 11 pm that my former sim's network was lost so I inserted the Airtel sim.
Since then it has shown no network at all, I was not even able to do the tele-verification, I restarted my phone, changed the sim slot, switched on and off the flight mode, I even mailed the Airtel customer care but it still shows No services/Emergency calls only.
What am i supposed to do ?
Please help me with this.