Reliance Communications — reliance postpaid no not working since last six days

I am using a postpaid reliance no. From last 10 years. From last 7 days i am unable to connect to network.
I have done basic troubleshooting like changing handset / handset reboot / made network selection manual from automatic but unable to get signal.
After rebooting i am getting message unable to register.
Right now i am in pune & as this no is with me for a long period, all my financial alerts are registered with this no.
I am unable to make calls or do any type of financial work as my connection is not working.
I am unable to contact customer care no also as i am getting msg like due to emergency services unable to help.

Please look into the matter & help me out to overcome this situation.

Regards,
Nishith