Vodafone — Data balance not given that offered

Address:

Kolkata, West Bengal

I see that by dialing *121# rupees 147 gives 1 GB 3 g but when I recharge it gives just 500 Mb.i call all kind of customer services. Related to Vodafone but not a single person try to talk with me just 10 second.and for this I lost 10 rupees from my main balance. I feel help less this money is so huge for little income persons like me.