[Resolved]  Vodafone India — harassment of payment

Address:

411057

Hi I am having Vodafone Postpaid services. When I was out of Country to germany, I availed 28 days of International Roaming Pack. Just before the day the 28 days is supposed to end, I called Vodafone Customer Care on 8th July to close the International Roaming and revert back to my previous billing of 99 rupees for corporates. They didnt ?? I dont know why, I found it out after approximately 20 days and sent an email to Vodafone services to Close the International roaming pack which they did on 20th July. I paid for the 28 days International Roaming pack. But next month I received an additional bill for activating the service from 8th to 20th.
This is when I harassment began. I asked several queries of explicitly stating "Why the Vodafone customer Service on 8th July failed to take down my request to close the International Roaming Pack?" to which I didnt get any response rather everytime they replied "The charges are valid so we cannot revert back". This email communications continued for 2 months where several tickets have been raised but nothing happened. Also, after August I mentioned in email to stop my Post paid Service immediately as till my issue is resolved I do not want any additional 99 rupees to be added to the bill.
They didn't even replied to any of my emails and added the charge instead.
Today I received a demand notice no.: DNOCT1104858 stating that I have to pay the bill or they will initiate Civil or Criminal Proceedings. They even have the guts to say that "I have intentionally and deliberately not paid the amount.." I was really surprised and shocked as it was my queries which they deliberately avoided and they are charging me of doing that.

I have all email evidences with me. What are the options I have?