BSNL Broadband(home 500) plan
Amount of bill is more than that of used

Hello everyone!

Please help me friends

This happens 2 times with me

I am getting service under Home 500C plan (night Unlimited)

This time I used only 1866 MB (This is shown on BSNL site)

But I got 779 Rs. bill This is written in Debits Charge.

Now what to do?

1.8 GB is in the limit of 2.5 Gb I have not crossed it so at most i would get the bill of 600 it is at most condition, but this is out of imagination

2 month before also I faced same thing at that time I have paid 1025 Rs. It was first time so I thank that it might be formalities but now again I am not understanding this problem

What to do? Please Help me