[Resolved]  Vodafone India — high bill on old number due to new sim not activated

I have a vodafone number in m brother's name which my mother uses ([protected]). Its a 2g sim and since my mother recently started using social media, i requested an upgrade to 4g sim.
My brother now stays abroad and vodafone needed him to walk to a store to get 4g sim for the same number, so we decided to get a new number in my name with 4g sim.

Sim got delivered on 24th nov and is still not active. My mother in assumptuion that new sim is active kept on using data on old 2g sim which had no data plan.
I refuse to pay the bill amount of rs 850 and would also expect a compensation for the delay. I complaint on twitter and 1 got 3 calls from different people but no one resolved the issue