permalink for product category

I wanted to have a permalink that would display products from a specific category that belong to the same brand: something like this:

example.com/brand/brand-name/category/category-name/

So what I was thinking of doing is what is in the code I wrote:

function brand_rewrite_rule() {
    add_rewrite_rule( '^brand/([^/]*)/category/([^/]*)/?', 'index.php?pwb-brand=$matches[1]&product_cat=$matches[2]', 'top');
}

add_action('init', 'brand_rewrite_rule', 10, 0);

And it works great.
The only problem is in the pagination, going to page 2 he presents the same products, of the first page, at this link:
example.com/brand/brand-name/category/category-name/page/2/

Thanks!