logo and slider issue mobile version

Hi there

On the mobile version, both the logo and slider image look disproportionate.
I tried the code you gave to the previous post, but it does not work for me unfortunately.

I would like the logo NOT to appear on the mobile version, but instead to be written “evisa formation ” instead.
I also would like the slider image and its contents NOT to appear neither.

Do you think you could help me?
http://evisaformation.fr/

many thanks

Sakina

The page I need help with: [log in to see the link]