Vodafone India — wrongly charged for number [protected]

Address: Kolkata, West Bengal

I have been wrongly charged on my mobile number of 14972/- rupees on my mobile number [protected]. I have written 4 emails to corporatecare. [protected]@vodafoneidea.com, but they didn't bother to reply even once to me.
Called them on their registered customer care number, every time they say they would call me back with a solution to my problem, but they never call back. I am getting harassed for a week now.
What should i do, please advice.