Vodafone India — vodafone store activate postpaid sim by misleading, and cheating.and for to use for 3 months.

Address:

713101

I ask for prepaid but they activate postpaid by misguiding/cheating and force to use for 90 days,... Stuff of vodafone store (Burdwan, west bengal, 713101) activate postpaid sim instade of prepaid by misguiding or cheating.
After that when i speak to other customers... I found that all r victim like me.
Vodafone please reply... Is there any time bound condition to migrate from postpaid to prepaid?