How to Properly Import a CSV File into Clay from Instantly Leads

Hey guys, quick and probably easy question. I’m trying to import a file I downloaded from Instantly of leads, which was then converted to a Numbers page. I then converted it to a CSV, but when trying to upload the CSV file into Clay I get two columns, with all the data crammed into column two. Including first name, last name, email, company name etc. How can I successfully import that list into Clay? Thanks!