Vodafone — conversion of postpaid to prepaid

Address:

500015

I have ported my number from reliance to vodafone. While porting i was told by store executive that in the plan 168 (Special plan for reliance people) i can migrate from postpaid to prepaid after 1 bill cycle.
Even customer care tells the same. But when i visited the store the store team has denied and told that 3 billing cycles need to be completed. They also tell me that customer care tells the people that potpaid to pre-paid can be done after one bill cycle but store will not do as it will affect the store and they will not get approval.

Very rude and wrong information is provided and at the end i did not get any help. Now not sure who will help me in converting my plan from postpaid to prepaid.