The price of canceling Adobe Stock

Hi, I've been gone into the exact same problem as Mr. pp14482125. 

I've registered to the student-educational promo where I am only charged something like $16 every month for all services. And so I thought this was an amazing promo from Adobe for students like me. 

Adobe stock came along with it (in my understanding) with 10 free stocks every month included in the promo. I guess not and so I was charged the (about) $36 dollars on the 2nd month so I tried to cancel but the Adobe page offered me 3 months of free usage and decide then if I want to cancel and now, there is a $150+ fee that comes along with my cancellation. I can't also change my Adobe promo since Stock seems to be a separate subscription which only came along with my initial promo. So I was really wondering if I could get some help to cancel just my Stock promotion since I don't use it and (I understand it must have been in the User Agreement page) important pieces of information like these must have been mentioned on the initial descriptions that are easy to understand. I believed these were ethical duties of companies, properly letting the customers know what they are getting into. 

Thanks.