in bsnl i am always getting more bill and i have taken plan of 625 how come this is like

Hi srikanth, welcome aboard ..
I think Rs. 625 plan is not available anymore on BSNL website, can you give me plan details ?
Is it limited plan or unlimited plan ?

What I remember, it was unlimited plan, then I think charges are for calls you made , are you using your phone for making calls also or only for internet ?

I do agree with Savera there is no such plan offered by BSNL. I think you are here to promote something except helping others.