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If after inserting an alternative network sim card i.e connects to mobile data etc and your in the UK and the Nuc didn't work then you may need a MCK / Mastercode also known as an unfreeze code as well as the Nuc.
Customer service on 191 or Live Chat 》 contact-us ,or the Vodafone Social Media Teams via Contact-us-for-account-specific-queries should be able to give you this if you ask specifically for it @MagicAro
There is no account access via this forum anymore.
Current Phone > Samsung Note 10+ 5G _256Gb > Model: SM-N976B.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.