Theme update caused Nav menu and slider issues

I just bought the Enfold theme so I can update the theme and transfer from a previous web developer. Mostly the transfer went well – the theme was updated and most of the pages look good. The urgent issues are:
1) that the top navigation menu is invisible unless you scroll down.
2) the sliders are very large and out of proportion with the site

Please help me fix these issues – the site is https://www.malcampdentallab.com/

PS – I also couldn’t find where to submit a new ticket on your support page, so please include those instructions as well.

I started a new ticket because this is a separate issue … I tried the code with the quick CSS:

.home #layerslider_1_1axwtszwevv9c {
width: 100% !important;
max-width: 100% !important;
}

with no results – thank you for the suggestion. Please provide some other ideas please