I have forgot to cancel my 7 day trail yesterday so it charged me for a monthly fee of CA $45.99 now. Can I get a full refund with the 14 days refund policy? I could not find anywhere to talk to a customer service. How can I get my refund?

if you don’t qualify, you can try appealing to adobe support via social media.

yes, refunds are automatic if cancellation is within the trial period. ie, make sure you're aware of 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 

for info on how to cancel your subscription, this page describes the few steps involved, https://helpx.adobe.com/manage-account/using/cancel-subscription.html

if you want to cancel but are unable to follow the steps described in the "how to cancel page", you probably have a payment error that you need to repair before cancellation is allowed, https://helpx.adobe.com/manage-account/kb/fix-failed-missed-payment.html