Hallo,
Entschuldigung für mein schlechtes Deutsch!
After reading your description and checking your website, I understood your problems.
To fix these issues, I need to access to your website's files through something called FTP details.
If you are not a technical one and can't go through this, just let me know and I will help you to get these details.
Grüße,
Yahya Elharony