In the plan it is said that you get 10 free adobe stock photos / month. I purchased 750 images with monthly plan and after one month I cancelled it. Now I don't have those promised 10 images neither in my personal / company's account. Why?
10 images were allocated to your team account on 11th Jan and they have all been used.
The individual offer applies to the 10 images/month plan. When you sign up for the annual plan, your first month will be refunded - details here: Royalty free images, photos, and graphics | Adobe Stock
Hope that helps.