Firstly, please note that this is an English language forum, so please write your messages in English. Feel free to use machine translation if you’re not confident in your own English language skills, but don’t require us to use one just to read your posts.
Secondly, you’re right that there is no option to contact support in the client area. Free hosting is supported only through this community forum, one-on-one staff support is only available on premium hosting.
As for the issue itself: I’m not sure if the problem you’re having is caused by your IP address being blocked on our end. A problem with your account, a network restriction on your end (on our FTP server or on all FTP connections), or something else entirely. I’d like to troubleshoot a bit more about what’s exactly happening before jumping to conclusions and looking for issues that might not exist.
Just to let you know, if it is an IP address block, then that block is temporary, and will automatically be lifted after some time. So just try again after a few hours.
This is not allowed on free hosting. Our FTP server can only be used to manage your website, not used for automatic backups of a camera. Excessive FTP traffic can get your account suspended.