Vodafone India — postpaid to prepaid

Address:

New Delhi, Delhi, 110017

I want to convert my no from postpaid to prepaid because prepaid have the same plan in lower price.
But now they want me to visit vodafone store which is not too near to my location.
Why it’s happening i can’t even understand when we want to port it in postpaid you send a executive but again for prepaid port they don’t have this option.
Contact [protected]