I was charge for the class dojo and this year I did not want to pay for it I just wanted the basic class dojo

Cancel the subscription, then contact Apple support to request a refund.

Link-> If you want to cancel a subscription from Apple - Apple Support

Link-> Request a refund for a cancelled subscription - Apple Support

That would be strange. If its been charged, then it should appear under your account.

Please, follow the steps here to try to find the subscription yourself: link-> If you want to cancel a subscription from Apple - Apple Support

If its not there, then make sure you have not changed Apple IDs since you subscribed to Class Dojo. The subscription is tied to the Apple ID that started it. If you have different Apple ID now than when you got that subscription, then you will need to access that account to cancel it, and then request a refund for it.