as Neha_07 said … OEM drives are sold to computer manufacturers or distributors in bulk packaging
if the warranty seal sticker was not sealed tight … you need to harass the seller on Amazon Germany about that
and while we are on the subject about OEM drives …
OEM drives are sold by WD to computer manufacturers or distributors in bulk to be installed in computer systems to be sold with the 3rd party manufacturers warranty.
They should not be sold separately as bare drive only … another issue with your German Amazon seller to address.
Anyways, the drive you bought has ZERO Warranty with WD and it’s not their problem.
It’s your problem with where and who you bought it from.