Query - Vodafone Recharge, best option?

Hi guys my validity is about the expire, Vodafone new prepared recharge is 599 rs for 84 days, my last recharge was of 399, so 200 rs difference already as per the new plans update in early December.

My query,
I have 2 connections, both prepaid, I want to recharge both for 3 months validity but 599+599 will be very costly. Any other more feasible option available? I am from MUMBAI, any other network provider which is more VFM?

I was thinking to move to family postpaid plans of vodafone, by getting more members from family to share bill amount.

Whats your suggestion?