Help with WooCommerce Plugin

Hi everyone,

I’m running a WooCommerce store, edyceramic-shop.ro, and I'm using the Colete-Online plugin to calculate shipping rates from various carriers in Romania. However, I'm running into an issue with products that are sold in large quantities (e.g., carpets, tiling, parquet) where the shipping rates are being calculated incorrectly.

The main problem is that many of these products are paletized or sold in boxes, which means they are heavy and require special shipping rates. Since I don't have weight information for these products in the system (due to the large quantities involved), the plugin is calculating shipping as if the products are very light—resulting in very low rates (around 20 RON), when they should be over 200 RON.

What I want to do is apply a fixed shipping rate of 250 RON for all products in categories like Gresie și faianță, Parchet, and Mochetă, regardless of their actual weight or quantity. I need to target these parent categories, but I’m not sure how to make this work with the Colete-Online plugin.

Has anyone else encountered a similar issue? Any help on how to set up a fixed shipping rate for these products would be greatly appreciated, whether through custom PHP code or specific settings in WooCommerce.

Thanks in advance!