Hi
Thanks for contacting us.
1: You can change the logo from here:
https://prnt.sc/exShIlWx1ccC
2: You can modify the telephone number from here:
https://prnt.sc/aSiWAyTkc15F
OR if you want to eliminate it then use this custom CSS in your custom.css file
.sp-contact-info li span.fa{
display:none !important;
}
If you want to hide the number then just empty that field.
https://prnt.sc/J_Yuyd-Zj4xo
3: You can change the font size of the menu from here:
https://prnt.sc/rFw2AY0aqwE0
4: And here is the footer section
https://prnt.sc/LUZZBBX8RP18
You can follow the documentation which will help you:
https://www.joomshaper.com/documentation/joomla-templates/megainc
-Regards.