Anyone registered before 22 August should have 2 £15 goodybag options - the old unlimited one and the new limited one (which can be tethered). If you do not choose the old unlimited one at least once every 60 days, it will disappear. New members only have the option of the new (limited) bag.
As you registered in April, you should have the option for both. Maybe contact an agent to see why you do not:
This link will directly let the agents know you have an issue with goodybags. They can take up to 24 hours to reply.