Are you using the plugin WooCommerce Product Vendors?
Well, I think you will love this tutorial then!
If you are one of those users who want to setup a custom vendor shop page, add this code in your functions.php file located in wp-content/themes/your-theme-name/:
<?php first line if you are having errors come up after saving the file.
Be sure to create a file named taxonomy-shop_vendor.php in your wp-content/themes/your-theme-name/woocommerce/ folder and edit it to match your desires.
For a basic configuration, I suggest to copy the template taxonomy-product_cat.php from the folder wp-content/plugins/woocommerce/templates/ and paste it in your theme WooCommerce folder. Then rename it and apply your changes.