Tata Docomo — sim card registration failed

My mob no. ([protected]]) shows error as "sim card registration failed". How can tata docomo deactivate my mobile without sending cautionary sms. I was not making call for a long time but i was getting sms in this no. Everyday. As i was not making calls, my balance was less.

But how can u deactivate my number without sending an sms (Or email). I[censored] have deactivated, then you must give another chance to retain the number after recharging some amount. How can u totally stop my mobile no. I am using this no. For banking transaction so i can't afford to loose this no.

Your customer care is not connecting. Please call me in my alternate no. ([protected]).

Tata docomo is requested to give solution for retention of the same number. Please solve the problem on a priority basis, because i need banking transaction immediately