Serial number registration issue

Hey guys

so im having an issue with a serial number

here is a little bit of backstory, took place in november

this drive has been connected to an xbox one since purchase

I sent a drive off for replacement as it was no longer detected by anything around mid november,
i received a replacement and that one failed in just under a week, same again no longer detected but powering up

so again i had to start another RMA, i received the replacement promptly on the 23/11/17 and it has been working fine ever since but for some reason i cannot register the serial number

i should had just over 2 years warranty remaining from the initial drive

Im not sure if i need to post the model and serial but here they are, if not can a mod redact them

WDBYFT0020BBK-EESN
these are copied from the RMA page

thanks in advance

Hello, craig911

Well, SN that you have mentioned is now registered under your account. You may check it to log in to your account:

https://westerndigital.secure.force.com/ind/?lang=en_US