I had this situation- while onboard two weeks ago, booked one of the now cancelled trips and used the MNVV credits. While the answer is yes, you should get it back, I personally had very frustrating issues because the rep did not process it correctly, so be careful when you make the change. In my case I received the cancellation notice on June 5 saying we would get FVC for the cancelled cruise plus some extra on June 6. I called on June 6 after the extra credit showed up, and said I wanted to take advantage of all of the FVC to rebook for the next sailing that was not cancelled. I also said I would like to make sure I did not lose the MNVV credit. The rep, instead of just rebooking, changed the sailing date from the cancelled to the new cruise, and in the process the system wiped out the extra FVC. Also, the price was significantly higher, and discounts lower, so they wanted several thousand extra for the new cruise in a lower category suite. The rep then said as far as he could see the FVC never existed, since it no longer showed up in their system. After two hours on the phone, and the involvement of a supervisor, the extra FVC was gone but I only had to pay $145 out of pocket for the change (and it was a 2 day longer cruise), so I was fine losing the "extra". The next day, however, even though I had received a paid in full email and the cruise showed on the website as paid in full, it changed to show I owed another $1750 more. The good news is I had posted about this just as a warning to others to be careful how things are processed, and VV reached out to me and offered to reinstate the credits plus make sure the cruise was paid in full. They were very helpful, and I think it was more of a combination of systems and training issues- the reps had no idea the cruises had been cancelled, even the day after we received the cancellation notice. The follow up customer service was good, though it did take two days and a few hours of my time to get it fixed. I think they are trying hard, and I hope they learn for the future about how to roll out the cancellations a little better if it happens again.