Custom taxonomy query-exclude post with specific term

Hello, I need help with my query. For now, I can get/retrieve and display the posts from certain custom taxonomy with specific term, but some of those posts are also/in the same time “within other term” that I woulld like to exclude.

Here is the situation:

– custom post type is ‘products’
– within products I have ‘taxonomy’=>’product-category’
(like post categories I can create in admin area) and two of them are called (their “names/slugs” are): ‘usluge-proizvodi’ and ‘akcije-novosti’
– some of the posts(products) are in the same time “within” ‘usluge-proizvodi’ and ‘akcije-novosti’ (like when the normal posts have two categories)
– I need to display all posts from ‘usluge-proizvodi’ EXCLUDING posts with term ‘akcije-novosti’ (within ‘akcije-novosti’)

I had no problem to display ‘akcije-novosti’ separately.
After displaying those posts on homepage (custom homepage template) I have to display latest posts from ‘usluge-proizvodi’ excluding those from ‘akcije’.

Here is the code I tested, without exclude, that displays posts from ‘usluge-proizvodi’, it is working ok:

<?php
         $args=array(
               'post_type' => 'products',
	       'taxonomy'=>'product-category',
               'term' => 'usluge-proizvodi',
               'post_status' => 'publish'
               'posts_per_page' => 8
                      );
          query_posts( $args ); ?>	

<?php while (have_posts()) : the_post(); ?>

I tried something like this to display ‘usluge-proizvodi’ excluding ‘akcije-novosti’ :

<?php
      $wpq=array(
           'post_type' => 'products',
	   'post_status' => 'publish',
           'posts_per_page' => 8,
           'tax_query'=> array('relation' => 'AND',
                               array( 'taxonomy'=>'product-category',
			              'term' => 'usluge-proizvodi',
			              'operator' => 'IN'
			             ),
                               array( 'taxonomy' => 'product-category',
			              'term' => 'akcije-novosti',
			              'operator' => 'NOT IN'
			             )
	                      )
			 );

 $filteredlist = new WP_Query($wpq); ?>

<?php while ( $filteredlist->have_posts() ) : $filteredlist >the_post(); ?>

But this doesn’t return nothing at all. I also tried some variations and either nothing comes out or it displays all posts from ‘usluge-proizvodi’ withouth excluding ‘akcije-novosti’.

I am still not enough familiar with syntax and codex, I guess this way is not the right way, I missed something …

I already did something similar with normal posts and categories, but I know that we can not do the same with custom post type …And mostly I did everything this way: query_posts(‘numberposts=5&category_name=news&category__not_in=15’); …etc
But I would like to learn Advanced Taxonomy queries.

Here is what I can see when I rollover my “custom so-called” categories like ‘akcije-novosti’:
…/wp-admin/edit-tags.php?action=edit&taxonomy=product-category&tag_ID=10&post_type=products
You can see that ID of ‘akcije-novosti’ is 10. Slug is ‘akcije-novosti’.

Maybe I need two queries, one to make an array with post IDs from ‘akcije-novosti’, and THEN exclude those posts from other query using their IDs?

If that is so I need your help with writing the code:
– how to get those IDs and put it in array / or variable
(I really need help with syntax)
– how to use it to exclude them from other query where I get posts from ‘usluge-proizvodi’

I am working on someone elses wordpress theme, helping them , this is the last “big” issue we have before finishing the work.
If I had more time I would study the codex and forums more deeply, but this is almost an emergency call for help.
Thank you all so wery much.