Airtel — sim card deactivated without any prior intimation

Address:

Chennai, Tamil Nadu, 600034

My sim card with airtel has been suddenly deactivated without prior intimation.
I was regularly using it and had also recently recharged it with a 3 month package.
This number was linked to important documents of mine, therefore airtel has damaged me creating a lot of troubles.
It has been told to me that i had to handover my documents to the airtel shop where i did the sim card even though i had never received any intimation from airtel. I went to the airtel shop and handed over all requested docs, but their manager mr. Mahesh s. (Nungambakkam branche - chennai) told to me i wouldn't get back the number even though i handed over the requested docs. Moreover this person had an extremely agressive and violent behaviour towards me, he completely lost his selfcontrol.

Regards

Angela