i recently had something similar happen to me as well
got the limited edition razer mouse and they asked for sirim registration thing
i went with custom agent coz fedex or dhl told me its an option
i messaged a couple that they recommend and paid like 50?
they settled it on the same day and the item got released very quickly
whole ordeal from when fedex reached out about the issue until i received the item was like 3 days
this is the kind of thing that i'd like to say, if you dont know much about it, just pay someone who knows to do it and it saves alot of headache for you
i was thinking maybe i drive down do it myself but then i have to drive down and do it lol
later mong cha cha and fk things up then have to do multiple trips and whatnot

yeah coz its expensive af and it was bought directly from razer
they shipped from hk to msia and used a courier service
but since the mouse is wireless so had to do the sirim thing
but honestly when fedex reached out to me about this issue, they also provided me with the solution (they recommend a couple of 3rd party agent that can do it for you)
but after i see what they did for me (the agent cc'd me in the email back to fedex), i feel like waterfish since its so damn easy but i didnt know what to do at that time and i was also in and out alot of meeting so i just paid the first agent that responded to me in the list
it was done really quick
if urs is being handled by POS then mileage may vary but the process is the same i guess