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This may help.
"If you have an advertising or sponsorship query, please contact our media agency MEC on 020 7803 2000 and ask to be put through to MEC's Vodafone UK team."
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.
This is something I have previously answered on the forum. https://forum.vodafone.co.uk/t5/Off-topic/Sponsorship/m-p/2571108#M21545
The Team can be slow to answer but there should also be an email address on the link.