I cancelled my subscription a few days after subscribing and received a confirmation email. However I’ve just been charged $47.99. How do I get a refund?

if you have no subscriptions and you cancelled a refundable subscription within the refund period, your refund can take up to 14 days to complete.

you can check the cancellation terms by selecting your plan type (at the top of the page here), https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html