Airtel — data service fail

Mobile # [protected]

I have having issues with my data services since last night. I m using this number currently in kerala and so it is in roaming. I had no issues till last night where it stopped working all of a sudden while i was on a video call. I can receive calls but i'm unable to even call karnataka customer care number from my mobile.
Please assist at the earliest. You may call me on my this number itself.