Thanks for reaching out to the Stock team. If I understand correctly, you want to cancel your Stock subscription which is associated with the Adobe ID shared in the forums. I just checked your account details (under the Adobe ID shared in the forums) and noticed that you signed in for the Stock 10 images per month (one-year) on 22 Jan 2018 and the subscription is currently in the suspended state due to some payment issues. Please contact our support team Support FAQ: How can I contact Adobe for support? for further assistance.
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
In case you are referring to a different Stock subscription which is associated with another Adobe ID, please private message me your Adobe ID so that I can further look into your account details.
Feel free to update this thread in case of any additional questions.