Cancel subscription keep getting charged

If you canceled it less than 24 hours before the end of a trial you will still get charged for the next subscription period. You will have to pay what you owe and Apple may not let you do additional downloads until you do. You can try to ask for a refund but they are not guaranteed,

Click on this link --> Cancel a subscription from Apple - Apple Support - "If you signed up for a free or discounted trial subscription and you don't want to renew it, cancel it at least 24 hours before the trial ends."

This thread (particularly posts by Mac Jim ID) outlines complex scenarios regarding subscriptions and trials. ➔ Refund request for unintended Snapchat Pl… - Apple Community

If you wish to pursue a refund, follow the directions in this support article about how to request a refund for apps or content that you bought from Apple ➔ Request a refund for apps or content that you bought from Apple - Apple Support The likelihood of you getting a refund may vary greatly from region to region as provided in section B of Legal - Apple Media Services - Apple . Typically refunds are entirely discretionary and not guaranteed. Special terms may apply for some countries: About canceling subscriptions in Germany, Israel, South Africa, or Türkiye - Apple Support