Bharat Sanchar Nigam [BSNL] — I am complaining about bill for broadband

Address:

Chandrapur, Maharashtra, 442701

I have not used the internet since august 23 but they have billed me for more 2 months howvevr i have not used it why am i supposed to pay for the things which are unused. Bsnl customer care is worst. Need solution for this. Why am i suppose to pay 4000 where in i was not informed that i have to give written communication for disconnecting the network also when i asked about the same questions will i be billed for not using the services at that time they say no you will be charge for using the services worst and fraud service