Thank you so much for your questions. If you want to increase the logo size, you need to customize theme theme.
1. First you need to hide the Header Advertisement.
2. You need to edit the code for Custom Logo inside
acmethemes/core.php. Increase the height and width there.
3. You may need to write some custom CSS too.
If you are familiar with WordPress codes, you can customize the theme as your need. Otherwise, you can hire customizer.
Note: Child theme is recommended to customize theme.