US H1B visa dropbox | Can I change the petitioner details after visa appointment confirmed and fee paid

I have scheduled an H1B and H4 visa dropbox appointment with my old petitioner (old Employer). Now I have a new job with a new employer, and all the petitioner details are changed. (see the image). I want to know if I can change my petitioner information on the UStraveldocs portal without canceling the appointment and paying the fee again. Or what are other options for me?

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No need to cancel and reschedule. Just submit a new DS-160 with updated information and carry both old and new DS-160 to your appointment.