Vodafone — delaying the process of going from postpaid to prepaid.

Vodafone is delaying the process of transition from post paid to prepaid. I have registered for prepaid 2 weeks back, still not converted. Due to this my post paid bill is increasing. Very worst service ever. And i why they have opened the mini vodafone store. There is no use of them. Whenever i go there they send back and ask to go to the main store. What is the use of them.