It depends on when the cruise departure date is. The deposit can be fully refundable if you cancelled early enough. Otherwise it starts to lose an increasing amount as the departure date nears, until you lose the whole amount.
As a travel agent I am under the understanding that deposits are NON refundable and only balances are refundable depending on how many days before the cruise goes. I don't know if you are in the UK or where but that is how our office works.
I just cancel a RCCL for a honeymoon couple and they lost their deposit.
But as the link you provided indicates (although not too clearly) the person can get their deposit back if the cruise is cancelled prior to the 90 day window. They lose the deposit once day 90 arrives.