Hey, thanks for reaching out! Sorry for the confusion.
Yes, you can use all the credits, but keep in mind they will expire when your plan renews. Since your total credit limit is 2x your plan, any credits above that limit will be lost once the new month starts. Based on the screenshot, it seems you’re on the 1k credits plan, which means you can hold up to 2k credits in your account, and anything beyond that will be forfeited.
You can read more about the Credit Roll Over Update here. Let me know if you have additional questions!