Trouble with footer on my website

All my elements in my footer are not showing up aligned properly when in mobile and when in the phone setting - the testimonial does not show up at all even though it’s totally there. I tried to inspect the footer and put in custom css, however it did not work. It could be I’m just using the wrong classes. It does not allow me to put in negative margins when I click on the individual elements. How can I fix this?

Here’s the link to my site:

Here is how it should look:

For the phone, this is how it should look:
Group 67 (1)

If someone has a solution for me. Thanks!
Nechama englard

What kind of blocks are you using in the footer?