I changed my plan from 1350 ULD to 2150 ULD in the hunt for a high FUP plan. BSNL has recently revised the plans so I thought it will good to go with a 100 GB cap plan.I shifted on 18th April, I was charged 3660 rupees in the last month billing i.e. for May. I had a convo with some CC after complaining online, he said I was overbilled as I paid 1350 advance when I opted for 1350 ULD back in Feb 2011 so I'll not have to pay full 2150 again. He said I'll get a new bill with correct amount, Its been 3 weeks still nothing.I haven't paid he bill yet, I know if I pay the full I should expect my money gone for good. The BB will be disconnected by 7th prob. if I don't pay. I don't have time to visit the BSNL center as I have exams going on.What should I do? Suggestions?