Govt service if they work, you're lucky otherwise you will need to close them.
The problem is all due to lines-man. BSNL unions have hijacked the whole country, they won't allow to privatize even lines-man work nor do they work themselves.
Even our Telecom minister can't do anything in this due to this.
As a last resort, talk to lines-man and offer some bribe(Rs. 100-300).