how much time does BSNL take to resume broadband service after payment ??

BSNL disconnected my BB connection as i didn't pay their bill of 2 months. but yesterday i made the payment and the fone line is active since then. but am not getting the internet light on modem, although DSL light is on. and my utstarcom router wasn't working so i got a new TP-LINK router. and now am getting the DSL light in this modem but internet light isn't on. is it because of some configuration problem or they haven't restored the service yet ??? ......... help

Keep reminding them, call them and ask them to activate.

if its a business day - the services should get restored within 4 hours..