are you sure you need ftp?
well, first why you entered "utf7"???
if you want to use unicode, you should enter "UTF-8" or "utf-8" but not "utf7"
I am sure that is the reason why the page does not work anymore
I think you should try to edit the entry in your database ;=)
Be very, very careful
Do a backup of the database in phpMyAdmin (it's easy) before you edit
I do not know your knowledge with databases, but at least you should be able to use phpMyAdmin or whatever database-tool your hoster gives you
then prepare mentally ;=)
remember that you must set the charset to UTF-8 and forget about utf7!
take a deep breath, promise yourself to be very carefully and to think before entering any data ;=)
set it to "UTF-8"
good luck!!