Hello,
1/ I do not see the cart button – https://gyazo.com/351cd24c02ae6de3928a8d676e763f03 Is it disabled for unlogged users? could you provide temporary wp-admin access?
2/ Use the next custom CSS code:
@media only screen and (max-width: 992px) {
.shop-filters-area .sidebar-widget {
width: 100% !important;
}
}
Regards