"Use my credit first" is broken by design! Auto renew kicks in when credit drops to £3; recurring goodybag costs £6.
EDIT: idiot typo. The title should say auto top-up!
So with credit at £5.99 the recurring payment fails, unless you're awake and top up manually. Seems crazy that auto renew doesn't kick in when credit drops too low to cover the next goodybag.
Is there any reasoning behind this?