BSNL — Extra charges on my landline bill.

Address:	Ghaziabad, Uttar Pradesh, 201204
Website:	www.bsnl.co.in

Dear sir,
My name is Ankur Verma and my BSNL Landline Number is[protected]UP West).
Sir, I bought a new connection in the month of August 2015 with internet broadband service. After installation i got the first bill for my landline bill.
And i paid for the bill for August and September. But sir, in the month of October they charged me with huge amount of local calls. And i am asking for the dialled local call details to the telephone exchange, they are not listening me and refused to give details.
I am the owner of the telephone connection so i have right to know about the payments and i did not dialled those calls.