Vodafone India — postpaid to prepaid conversion

Address: Belgaum, Karnataka, 590001

I went to vodafone store in belagavi (Near goaves).
The executive named jennifer said that i cannot convert my postpaid sim to prepaid sim. Then when i rushed to manager named rekha and told her about my problem, she first agreed to help me but later told that the person whose number is, he/she must come and do the procedure as my parents live away from town they cannot come, hence i requested her to help me but she told me to submit the noc form from my dad whose number this is
This contradicts with my experience with airtel service center, where they happily helped me.
The complete address of store is as follows
1049/a/1, ranade colony, tilakwadi, belagavi, khanapur road, khanapur road belgaum, belgaum - 590001