Vodafone India — lesser benefits got under rs 349 recharge plan than rs 348

Dear team,
I have been recharging my no. With your rs348 prepaid plan from last 2-3 months. These month on 13th i by mistake recharged my no. By rs349 instead of rs348, under which i got only 2 gb data pack to which i am not satisfied with the recharge plan, whereas under 347 plan you have given 28gb data pack plus unlimited calling, so my point is why customer is getting lesser benefits under 349 plan than 347 or 348 plan.
To address these concern i called your customer care support team to switch over my recharge plan from 349 to 348 but were unable to do it.
These was the worst experience i had with mobile operator.