the 2 year guarantee is the responsibility of digitec, during this period digitec will take care of your warranty claim. the 5 year warranty is corsair's thing, you have to send the defective ssd directly to corsair (or a corsair service partner) to get it replaced.
that's the same for samsung. i'd guess that digitec has some outdated or wrong information in their pim system. may happen if you have to manage several 100'000 items.