Hola Angel.

About Bottom Navigation Dots

In Addon settings try to find border color option and change color from white (or none) to grey.

If somehow you cannot find it, then in Page Settings > Page CSS > Custom CSS add that

.sppb-carousel-extended-dots ul li {border-color: grey !important;}

On my demo site it was at the bottom of settings, use width & color

About Navigation Arrows:

Start from that Custom CSS

.sppb-carousel-extended-nav-control .nav-control.prev-control 
{margin-left: -10px; font-size: 36px;}
.sppb-carousel-extended-nav-control .nav-control.next-control 
{ margin-right: 30px; font-size: 36px;}