A Big Value Bundle is valid for 30 days from the day you buy it. It'll automatically renew after 30 days, as long as you have enough credit.
If you have no credit at that point, we'll renew your Big Value Bundle allowances as long as you top up within the next seven days.
If you still don't have enough credit after seven days, you'll be opted out of your Big Value Bundle. You can opt back in later by logging in to My Vodafone or by calling 4345 free from your Vodafone phone.