I was hooked into the Adobe Stock via Dollar Photo. When I tried last year to cancel my adobe stock photo membership they said I wasn't able to and would have to wait til the end of the year. Now I am told I am auto signed up for another year. I cannot for the very-educated life of me figure out how to get out of this whole entire thing. I am retired and no longer need any of this.
if that doesn't help you cancel, using a browser that allows poups and cookies, contact adobe support during pst business hours by clicking here and, when available, click 'chat', http://helpx.adobe.com/x-productkb/global/service-ccm.html
You can now self cancel your Adobe Stock plan from your account page.
Please refer the help document below to understand the workflow:
I hope that helps!