Hi,
The volume/weight restrictions of shipping plugins was a trick to make it work for simple cases when HikaShop didn't had anything better to handle exclusion of products for certain zones.
Since one or two years, there is new feature to handle that properly:
You can turn on the "use shipping price per product" option of your shipping methods to add a new "shipping prices" area at the bottom of the product edition page where you can set the shipping price of the product for each shipping method, but also block shipping methods when that product is in the cart. So if you have different shipping methods for different areas, you can use that method to prevent shipping to some areas when some products are in the cart.