Could not cancel plan but now I am getting charged

I used the 3 plans which had a free trial at some point this year, and I successfully cancelled the first two. After using the last plan, which was the creative cloud all apps plan, for a project, I was trying to cancel the plan but the option wasn't available and I couldn't find it anywhere on the site, and soon after when I was browsing the plans, it showed no plans available, and I checked my billing history and I was charged £0.00, for all 3 plans. I could still see photoshop as part of my apps, which also occurred after I cancelled the other plans but I couldn't open it, and I assumed I had cancelled it. But it has been 2 months and I have received a bill for the past 2 months and now that I go on my account, and try to cancel the plan, I see there is an early cancellation fee, for almost £300. I was very new to the community and had no idea that there are forums and how to ask questions but now I have done more research I see others have had similar issues. Is there any way someone can help me get a refund as this was clearly an issue in your part when your site wasn't giving me the option to cancel my plan. The last time I had saved a photoshop piece was during the free trial, and I made sure I saved all my pieces as a jpeg so I can open them once my trial had ended, and since, I hadn't touched photoshop or any of the other apps in the plan, let alone use it create a piece. So, please, if anything is possible, as all of this could have been avoided if there was a cancel option, and though there is an error in my part, I was very new to the community and had no idea it was possible that I could ask questions here, and had assumed that the company was professional enough to have the plan cancelled in some way, considering there was no cancel option. I had tried to contact adobe by searching for an email but I didn't find any, and now I have to come to find out that there is no direct option of reaching out to adobe as there is no email. Overall, I would wish that someone help me out regarding this, as this wasn't my fault, and I have read other threads where people experience similar problems.