It is possible to send a message to the service provider's support service.
To open the feedback dialog, click on the user name in the top bar and select the "Feedback" menu item.
The "Feedback" dialog box opens. By default, the e-mail of the current user will be filled in the "E-mail" field, the response from the support service will be sent to this e-mail. In the "Message text" field, enter your message text. You can also attach files by clicking the "Attach files" button.
To send a message, click the "Send a message" button and this message will be sent to the service provider's support.