I never asked for one year subscription I got charged without even asking how can I get refund I cancelled my subscription

I did one month subscription on 17th of February my next payment was due on 17th March for next one month 

But I got charged 69.99 € annual subscription on 26th February which i dont intend to pay or continue as I got much cheaper option for that.

Also at the time of initial subscription I was told that i would get a reminder 2 days prior to my next payment. I never got any reminder for taking one whole year subscription from my account.

Kindly refund this amount as soon as possible as im not availing the service which I got charged for