what are your intentions??
1. If you want to upload or provide additional documents-> send it to webform.
2. If you have any questions about your application, send them a webform (absolutely the question should not be related to your application status if it still within processing time)
3. Even if you contacted them by phone or webform, the answers likely same "your application still within normal processing time / if we need more information will contact you / still in process,....)
All above make sense if an application is not passed processing time yet.