Bulk Import CSV files into WordPress

General information for the website: Woocommerce store
Description of requirements/features: I need someone familiar with importing CSV files into WooCommerce to work through 6 CSV files plus one smaller Excel document and import them into the product list.

I'm having problems using WP Import as it keeps timing out so need someone who's familiar with other ways of importing, possibly using MySQL import to get the data in.

The site is at http://217.199.187.198/jetmaterials.com/

We're using WP Import but the server keeps timing out during the import and each time we try we get duplicate records created.

The csv files are in https://www.dropbox.com/sh/4wqv8823dutbaqy/AACcC0P7p9doyUYJazavZdq1a?dl=0

Please note, we have successfully imported the Aggregates file so you can ignore that one. We have also managed to get 38 of the Bitumen data file imported.

We also need the csv file in this folder uploaded. Please check and let me know if you can assist with this also?
https://www.dropbox.com/sh/ixh88hxeqvga9qe/AAD_D4jCSLru3Emj8EACFnXUa?dl=0

This is now urgent as we have been let down by another PPH developer so it has to be done today.
Extra notes: