DeviantArt Banned Me Without Explanation - Deleted All My Artwork

The imprecise policies of DeviantArt make it nearly impossible to know if your work satisfies their criteria. Their judging of your images is based on an artificial intelligence system; should the AI determine your artwork is improper, you are permanently banned without any reason. Worse still, all choices are final—that is, even if the artificial intelligence makes a mistake—there is no way to appeal or know what went wrong. There is still a lot of similar artwork on the site, hence it is difficult to know why I was removed. Not only that, they also remove all of your uploaded artwork and you are not even given the option to download your own masterpieces. Especially if you have put time and effort into your job, it seems unjust and aggravating.