WooCommerce csv Import via csv Import Suite

I need to import some sample products from a CSV file that is created by an EPOS system. I've added WooCommerce CSV suite, but struggling to map the fields correctly to import the variable products. The products are clothing items and have variations including colour and size for example I have added an example of the data to GDrive as the files can't be added here. When I import the different sizes remain as individual items. I need them to be merged so that the variations are options on a single product. To do this I need someone to reconfigure the csv file to allow it to import correctly so that the information can be replicated by the EPOS system.

https://drive.google.com/drive/folders/1-7L8-yYduXqQO8BRJtyqw-iNtaJ3qpP1?usp=sharing