Open SEO › Plan & credits and scroll to Credit history. Each line shows when it happened, what it was for, how many credits were added (green, with a plus sign) or spent, and your balance afterwards.
Typical lines are:
- the credits added when your plan started or renewed,
- a site audit, with the number of pages,
- a daily rank check for one keyword,
- a keyword, SERP, domain or backlink report.
If something looks wrong, open a support request and mention the date and time from the history.