Hi, @HarryBowers. I appreciate that you are keen to receive the £100 Samsung.com voucher in respect of your new Care+ Boost policy. I've been able to locate a promotion that was running last year, so I'd expect similar terms to be applicable in this instance too:
The key text here is: "the Participant will then automatically receive from a Promoter nominated third party either a £50 Voucher or £100 Voucher which can then be redeemed on Samsung.com subject to the corresponding minimum spend for a single transaction."
The offer certainly showed for me as well, and it is clearly stated on the site.
Just to reassure yourself, I'd recommend that you continue liaising with the Support Team here:
Please keep us updated.