Vodafone India — Mobile Internet capping - amount added extra

Address:

Bangalore Rural, Karnataka, 562123

My name is Mana and my Vodafone No is [protected].In my bill No 97143184 dt 20.01.17 the mobile internet capping for Rs 650/- which had been discounted every month but in previous month it has not been discounted.
Because of this i am not able to pay my bill and my outgoing calls is barred.
I have already called customer care several times but no positive response from their end.
Initially when i called customer care they told that it is some system error and they will rectify the bill and resend after few days but now they are stating that the bill is correct and i have to pay the full amount.