We understand your concern about the disappearance of your credits. There are a few possible reasons for this:
1. Credits can be spent on tables even if they're later deleted. Check your trash folder for any deleted tables that might have consumed credits.
2. Auto-update might be turned on for some tables. To prevent unintended credit usage, you can turn off auto-update by selecting the three-dot icon beside the table name and then selecting auto-update.
3. If you're still unsure about the credit usage, you can check your credit usage details in Workspace Settings > Plans and Billing.
If you need more credits, you can purchase credit top-ups or consider upgrading your plan for increased credit allocation. If you need further assistance, please request to talk to a person for a detailed review of your account.