Hello,
I have read your entire description, YES, I can Add account numbers to WooCommerce users from current database with supplied CSV account numbers. As I have been working as a "WEB EXPERT" for more than 7 years. But could you provide following details so will work well on it.
>> Login Details
>> URL of your website
Apart from that, I have legit command over WordPress website development + design + SEO + Hosting management. So, I regard myself as suitable for this work.
I am waiting for your reply to proceed further discussion.
Thank You.