Tweak some functions.php code to change wordpress user roles after purchase

I need user roles to be change after they purchase a package level. For example, if they purchase a Silver Diamond Package, I need their user role to be changed to "Silver Diamond" I need the code below modified with my specific product info in. There will be 4 different levels that someone can be changed to when they purchase a product. I only wish to pay $10 since this is so simple. This is a good project for a person to use to increase their Freelancer cred. Here is the code we have so far: /** * Change Roles Upon Checkout * */ function lgbk_add_member( $order_id ) { $order = new WC_Order( $order_id ); $items = $order->get_items(); foreach ( $items as $item ) { $product_name = $item['name']; $product_id = $item['product_id']; $product_variation_id = $item['variation_id']; if ( $order->user_id > 0 && $product_id == '33' ) { update_user_meta( $order->user_id, 'paying_customer', 1 ); $user = new WP_User( $order->user_id ); // Remove role $user->remove_role( 'subscriber' ); // Add role $user->add_role( 'contributor' ); } } } add_action( 'woocommerce_order_status_completed', 'lgbk_add_member' );