Anyone who is having an issue using the Disney plus code you got from your phone or tablet, use this link https://www.disneyplus.com/en-gb/redeem enter your current email address registered with Disney after you enter the code. As long as you Disney account has expired/cancelled it will restart the subscription.
Big gotcha here though, it willl say it will put you on a monthly subscription or you can change to the cheaper monthly subscription. DO NOT change to yearly. It will charge you there and then for the following years subscription. Even if you cancel it, you will still be charged to the end of the 2nd year after your free year.
I'm trying to get through to Disney to ask for my money back. What a scam on DIsney part, basically allow you to change to a yeary subscription, while you have an active subscrition and take the money there and then, not when its due for renewal.
I've just encountered this issue. I've gotten in touch with PayPal to cancel the transaction and am trying to get in touch with Disney in regards to this
The terms say "a Disney+ code shall be emailed within 28 days of verification." Going back to Samsun Boost brings up the form again but the IMEI is already submitted.