Vodafone - Postpaid Bill payment

I have been using vodafone & previously hutch prepaid for close to 4 years. Around 10 months back i was transferred to Hyderabad. I got a prepaid no. of Hy'bad but the vodafone sales executives lured me & converted my connection into a postpaid. After 6 months, I had to urgently leave A P as i got a new job in Delhi & had to report there urgently. In Delhi I requested the vodafone store staff to take my pending amount & deactivate my connection but they were very unprofessional in their approach & in place of helping me they were telling me to go to A P to get the connection deactivated. I wasted my three days trying to persuade & convince the Vodafone staff of different stores. I even made repeated STD calls to the vodafone Customer care of AP but to no avail. Now they are threatening me through Emails to pay this outstanding bill within 4 days or face legal action.

Please tell me can they prosecute me legally for not paying the outstanding bill?