BSNL land line 2751575 — urgently cut my connection

Address:

Nagpur, Maharashtra

Sir.I have installed landline no[protected] in my govt ,quarter.It is not working properly.Thire is a trobule in hearing the vioce .It is difficult to hearwhat person is talking. I have taken bsnl wll no 2042651.
Now i want to close the land line immedetly Please do needful.and help to save my money to pay the bill of my new number.i Have given complant in writing in Sakkerdara office. before 1 month but no action is taken. this is my 2nd mail please help me.
Snehalata A Shejao