H1B visa stamping reschedule when all reschedule chances used up

USA H1B Visa
1

I have an existing H1B visa stamping dropbox appointment, but I have used all my 5 chances to reschedule.

Now if I find a more favorable appointment, I will have to:

  1. cancel existing appointment
  2. pay new MRV fee, and wait for it to get reflected before booking the new slot.

This will cause me to loose the favorable slot and existing slot as well.
How can I reschedule without loosing both the appointment slots.

Is there a way to pay another MRV fee and keep it for future, how ?
Can I make another account and try to make MRV fee payment using that account and book a slot whenever I find one ?