Fnb is a joke!!!

I pay an online service with my credit card. The supplier takes a whole year's subscription off immediately instead of the 1 x monthly fee p/m. I ask Fnb to reverse the transaction because I canceled the subscription and was expecting only 1 month's payment to come off (I can't afford the wholes year's sub one shot!!??) but they TOOK A WHOLE YEAR'S SUBSCRIPTION VALUE OFF ONE SHOT IMMEDIATELY!!!! WHAT THE ACTUAL F!!?? this should be ********. Surely if you ask a payment to be reversed FNB must reverse it!!!??? These ppl I had the subscription with. If they did that to all the subscribers they rolling in the money and there's absolutely nothing you can do to get your money back!!!??? Now Fnb needs me to send an ungodly amount of proof and copies of all kinds of documents who knows *** for. REVERSE THE PAYMENT THEY TOOK OFF MY CREDIT CARD!!!!! I'm not *****ing my money back. It's MY MONEY THAT WAS TAKEN FROM ME!!!! I sent them an email screenshot showing I asked this place for my money back. The email came back in error so you cant even get hold of these ppl. That is the proof, what other proof do you need!!?? Also, I canceled my subscription within 1 hour of subscribing. Surely I have some sort of protection against deciding against the subscription, once when I'm part of it realize it's not what I wanted. Customer consumer protection act!!??