When you have been expelled for selling stolen models, there are no second chances, much less third, fourth, fifth ... CGT is obliged to take the necessary measures to avoid repeated and imminent infractions and that includes the permanent expulsion of the violators. Some copyright owners defend their rights to the ultimate consequences, not to be made a joke. Be glad that it is the worst thing that happened to you, because this type of infraction can have administrative and even criminal sanctions, depending on the severity of the infraction.
CGT should send the expelled, an automatic reply with the reason for expulsion, to avoid messages like this in the forum. Or better yet, take effective action with repeat offenders, rather than wasting time with them.