Hi Yoann,
Sorry to hear that you are facing troubles with Adobe Stock services.
I have checked your account details and noticed that you had signed up for Adobe Stock 10 images per month (one-year) plan on 17 Jul 2018 which has been cancelled now.
When you subscribe to the Adobe Stock promo offer, the first-month is a free trial, Adobe doesn't charge you for the 1st month; the subscription billing actually starts from the second month.
If you cancel during the first month billing cycle, your credit card will not be charged and your service will continue until the end of that first month’s billing cycle. If you cancel within 14 days after the beginning of the second month’s billing cycle, you’ll be fully refunded.
For more information, please refer to Adobe Subscription and Cancellation Terms | Adobe
Please contact our support team Support FAQ: How can I contact Adobe for support? for refund related requests.
In case you are unable to reach our support team through the above-mentioned link, please see Contact Support FAQ: Unable to reach support through the "Contact US" link
If you still face troubles, feel free to update this thread.
Regards,
Twarita