No, a change to name is not permitted in Jet Airways. You would need to cancel your ticket and book a new ticket with the correct guest(s) name. Cancellation charges, if any, will be applicable accordingly.
No. Bookings created on jetairways.com will use the original Debit / Credit card that was used at the time of ticketing to make any further payments on jetairways.com
Currently passengers who have booked their tickets on jetairways.com, across Jet Airways offices / Travel Agents (Ticket number starting with 589) are eligible to use Manage Booking facility.