Visa interview for June is canceled in Kolkata, no date available

[RFromLondon]

Hello,

I have an H1B transfer that needs to be stamped. I had my interview scheduled in June in Kolkata during my planned summer trip. Now the interview is canceled for Covid-19. I don't see any interview slots in Kolkata other than one day in October. However, there are plenty of dates available in Chennai / Hyderabad / Bangalore / Mumbai / Delhi throughout the year.

* Is anyone else in the same situation?
* Why there are no interview slots in Kolkata only, though the slots available in other colulates?
* Can I use my MRV fee to schedule interview in another consulate?

Thanks,