Aircel — outgoing calls and sms issues

Hi
All of a sudden, incoming and outgoing calls, outgoing sms from aircel number is not working. Incoming sms is the only thing that works. I don't know the reason for this and the number is linked to my bank account, wallets etc. So its very important for me to have the number working as expected with all the services. Not even able to call the aircel customer care and all the network bars are shown.