eHarmony complaint: Subscription

About one month ago I signed up to have access to Eharmony website. When I did it my intention was to use the website for only one month but after one month they debited $28.00 from my account and said I have to realize monthly payments until March 2022.
They said I’ve chosen a Premium Membership and even after I’ve sent emails explaining that I’ve done that by mistake they claim there’s nothing I can do about it.
The point is I’ve made a mistake, I don’t know what I did wrong, but I never had the intention to use the website for more than a month and I don’t think that this is fair. I shouldn’t be forced to pay for a service which I didn’t like it. They should’ve asked if I really wanted to keep using the service.
English is not my first language and maybe I didn’t quite understand the terms of the subscription and that’s why I think they should be more understanding.