If you received a Content ID claim, you can dispute it with the following message: "The track was legally obtained from the Icons8 Fugue website: https://icons8.com/music".

Attach your Icons8 receipt confirming track purchase to the dispute as proof.
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You can find guides on how to dispute a Content ID claim here.
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Your video won't be removed. Usually, the claim's purpose is to track or monetize the video, not to block it. After you submit your dispute, the copyright owner has 30 days to respond. During this time, the claim will be temporarily released. If they don’t respond within 30 days, the claim will expire, and you won’t need to do anything else.

Please note that a copyright strike is a different thing, and it may result in your account getting blocked. You may learn more about the difference here.