Airtel — NO SIM Showing

Hi

My Airtel sim showing no sim for last one day
I tried everything phone restart, re insert sim but still it’s showing no sim
I do have only one Airtel number and I’m not able to speak with customer care
When I send email it showing my email address is not registered with Airtel sim
They want me to register my email with Airtel sim but it’s not working how will I register when it shows no sim
My work is completely rely on this number
Plus no one near is using Airtel
Please help me to get back my number
My number [protected]