How do I stop my Gig cover from getting rejected?



I created a custom image for my gig using icons from an icon set that are free for commercial use if you include an attribution. I’ve put the attribution link at the top of the image, but it is being rejected for a copyright violation. Any idea how to get this approved?

If I buy some icons and use those will I get rejected? There doesn’t seem to be anywhere that you can say I have the right to use these icons.

Any help would be appreciated.