We are sorry to hear that this was your experience. In rare scenarios, the creation process for your web app could experience a hang up and take longer than expected. In this case, you should attempt to create a new web app as the original web app creation is likely to fail and error out.
If this is a frequent or common occurrence, please capture the details and create a post here on Q&A so an engineer can investigate the matter further. Thank you for your understanding on this.