Why can't I connect with someone about my charge from Adobe?

I would have to use a messaging board to try and connect with someone who can actually help me. Anyways this August 6 I subscribed to Adobes 7-day free trial to edit a document for a schoolworks. At the same day,  I cancelled that subscription so I would not be charged, and i recieve an email of calcelling the 7 subscription. But this August 28 I look at my billing history on my Gcash account and see I have been charged 1,674.40 pesos. Apparently I have been getting charged  AFTER I canceled my 7-day free trial. This is absurd and I want a refund my subscription  without the cancellation fee. I am a college student and am barely scraping by. I need that money tommorow for my school. I find it very slimy for this company to do this and not even send an email letting me know that I am being billed, I am very unhappy about this.For some reason i cant post a question