Tamil Nadu Electricity Board [TNEB] — different fees in online payment

Website:

Tamil Nadu eb bill website

Respected sir,
I paid my eb bills through online. My eb bill fees is 567 in my eb bills notebook.. But online my fees is 661. How to increase my eb bill fees? I paid 661 eb fees.. How to recollect my 100 rupees sir! I lived in madurai. My consumer no is.[protected]. Please help me sir... My eb bill consumption is 80 units... I paid eb bill on 24th december 2017... What is the reason of different fees appeared! I had very confusion sir... I also got msg of 567 eb fees only... But in online it shows 661 fees... I paid extra amount of 100. How to get my extra amount sir... Please tell instructions for get my extra amount... Please do needful sir... I will request that please tell procedure of get my extra paid fees...