here is how you can find out your FTP URL and credentials on azure.
Please see get_profile.png image to find out how to get .PublishSettings file.
When you get .PublishSettings file, please refer to profile_content.png image to and see publishUrl (please note that /site/wwwroot should not be excluded from URL), username and password.
If you successfully connect to FTP, you will be able to get log files from ~\Portal\MonoX\ApplicationData\Logs location. You can send us logs then so we can investigate your problem.