Hi Hugh,
Sorry to hear that you are facing issues 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 17th January 2018. When you subscribe to the Adobe Stock promo offer, the first month is free, Adobe doesn't charge you for the 1st month; the subscription billing actually starts from the second month.
You were getting charged for Adobe Stock subscription on 17th of every month(from the month of February). The subscription stands cancelled now.
Feel free to update this thread in case of any additional questions.
Regards,
Twarita