Tata Docomo — duplicate sim not showing network

Address:

Pune, Maharashtra

My docomo sim was lost with number [protected], i purchased a duplicate sim for 130rs.
They said it will be activated within 3hrs, but its more than 3hrs now.
I called customer 2-3 times they say its activated.

I also contacted at [protected]@tatadocomo.com, but as usual no reply.

Why its taking so much time to get on network.?

Please resolve this as early as possible