Hi there,
Might be css we had provided is overwrite by other script. So try by giving on hierarchical way for an example:
body .wk-slideshow-circumference .caption {
bottom: 0;
}
or give !important at the end of value:
body .wk-slideshow-circumference .caption {
bottom: 0 !important;
}
Note: This is the custom changes on your website so without looking on to your website we couldn’t provide you appropriate solution. So It will be better if you take help of nearby developer.
Thanks