Welcome to Vodafone Community
To pass the required security checks to prove your the account holder @DSMITH75 you will need to contact customer support I'm afraid.
A PAC cannot be issued via this Vodafone Forum.
Perhaps ring 191 and choose the 'thinking of leaving' option which should get you through to the Retentions Department who can issue the Pac.
May i also offer the following advice @DSMITH75
Please do not cancel your Direct Debit until the final bill has been paid which can take Vodafone around 2-4 weeks to produce and collect payment along with any relevant refunds and a following Sorry your Leaving Letter and a £0 bill as per When-will-I-receive-my-final-bill. Keep these.
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.