It's odd that you keep getting the notification. As I said, I was asked when setting up a new device, declined, and never heard anything again. As this isn't a persistent issue with all business contracts, it sounds like something either with your device or account. It might be worth dropping into a Vodafone shop when you're passing one to see if they can help - a lot will depend on whether you get an assistant with technical expertise or not, but it's worth a try. If it requires account access, you may need authorisation from the account owner (for a business account), even if that's yourself. I've had to write self-authorisation letters in the past!
If that doesn't get you anywhere, post back here and the forum team will be able to have a look.
