Airtel — very poor customer service no contact numbers

Address:	New Delhi, Delhi
Website:	airtel

I have prepaid mobile connection with airtel. My mobile no is [protected]. I received sms that outgoing service will discontinue from 24th dec although i have account balance of rs 150. I treid to contact by email 121 etc to contact them but no response. Other customer care numbers are not responding and they charge for these services. Why such harasement? Trai must take strong action.