A completed card payment is normally added to your balance automatically within a few minutes. If you can't see it, check these:
Transactions: open Credit Balance, then Transactions, and look for a DEPOSIT row with that amount (what the row types mean).
The workspace: a top-up made while a team was selected goes to that team's wallet, and the page says This deposit will be added to the team wallet. Use Switch Workspace in the banner to look there.
An unfinished checkout: if checkout showed an error, or you left it before paying, the payment didn't complete. Try again.
A monthly plan adds credit with each payment. See monthly credit plans.
Card charged but still no DEPOSIT row? Send us the amount, the date and time, the workspace, the email you used at checkout, and the receipt or invoice number if you have one (where invoices are). Never send card details.