Acrobat Reader Samsung Subscription

Hello,

I am really unsatisfied with what has happened. A week ago I needed to use acrobat on my phone as I was away and had to sign some documents and this was pretty much the only time I used it. I found out that I had to start a subscription to be able to edit the doc but while trying to do it I got an error and thought okay maybe there was an issue with my connection and when I tried to do it again(this is to start the 7 days trial) it was giving my an error saying that I already had purchased this. Now fast forward a week from that time I get a receipt where £53.89 VAT included are gone from my account while acrobat still shows that I don't have a subscription so there was no way for me to cancel and still not and just losing money. Great, now can I please somehow cancel this and please get my money back? I never ended up using the premium feauture anyway as I still have no acess to it, just somehow getting my monety though.