Have you checked in your Samsung Members App for any relevant information @OwsT
If the promotion was being run via a network that supplied the phone then check their promotional Terms and Conditions for advice and links.
If via Samsung then check their Terms and Conditions too.
Their will probably be a start and end date for the promotion.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
(I filled mine in earlier - hope I didn't mess it up by selecting for business use at the for business or personal use section cos I'm gonna be using my phone for both and wasn't sure which to select!)
Edit: My claim was validated today (13th October) - awesome!