Airtel — SIM card isn't responding

Dear Airtel, My airtel number [protected] has been suddenly stopped working, it has been dead from last 2 days. I tried contacting airtel customer care but haven't succeeded in doing so. Why airtel is not starting my number again, this is pathetic airtel customer care service never goes through. Please activate my sim again. This number is important to me as it is associated with my all transaction and interactions. I have been using this number from last 2 years. I do not understand, why Airtel is taking fun in loosing customers like me who has been with airtel from last 10 years. Please take action as soon as possible. Best Regards