Age rating and simulated gambling?

We have an app dedicated to dance and as a fun treat we have a spin the wheel to reward users with free coins and gems. The prizes are only free coins and free gems.

We give all users access 1 free spin the wheel every 24 hrs.

They're saying I need to change my setting to frequent/intense which takes my rating to 17+

At most we should be 12+ rating

Our app is family friendly. Any suggestions will help.
Age rating and simulated gambling?
 
 
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