I've found BF to be very helpful when I've had to make changes to a booking.
But I'll also add that when it's rough, it can be very, very rough.
I suspect the percentage of very rough trips is very low but on the way back from Santander last year
we only managed to leave the cabin when we were back in the English Channel.
Prior to that walking anywhere was simply not an option so we stayed in bed, strapped in.
There are straps on the bed to hold the bedding in place when the bed is fitted flush with the wall.
Top tip - if it does get rough use these straps to secure yourself in the bed.
Bon voyage.
Stuff the life jacket under the mattress to wedge yourself against the bulkhead.