Bharat Sanchar Nigam [BSNL] — close the prepaid internet connection

Address:	Chennai, Tamil Nadu, 600094
Website:	www.bsnl.co.in

I was having bsnl prepaid internet connection due to transfer i could not use the services so i am not using their internet any more but still every month they are charging 2955 rupees
My customer id [protected]
Account no [protected]
Even though they have fixed the credit limit 3000 rupees they are still sending the bill with every month increasing 3000 rupees
Since i am away i was not able to go to bsnl office i checked their website any online method to close the account there is no provision for closing the account