A magazine company I was going to subscribe to sent me their product without me ever confirming my order am I obligated to pay?

Working for companies ive worked for in the past has taught me to be very cautious about "hidden fees" or automatic bill pay type deals, so those are things I really tried to avoid when subscribing to this magazine. On their website I couldnt find any type of pricing info. This was a year ago and all I remember seeing was "you'll pay xx.xx per magazine!" I wanted to know if I'd pay monthly installments or all in one shot and when I'd pay. Thtoigh the steps to confirm the order neither of those were mentioned. I thought if I got to the end then it'd say something. I got to where I'd put my address in, didn't put any payment info in and still nothing. So, I completely closed out of the page. Minutes later I get an email confirmation for my order. I go back to the site, find where to cancel an order, do so, and that was that I got an email saying something like sorry to see you go. About a week later I end up getting a magazine. I remember thinking maybe they sentit before I could cancel the subscription (the subscription I never agreed to) but I continued to get magazines from them. No I never called them I know I should have but I didnt. My concern is how are you going to send someone something without any type of promise to paywithout any type of payment method added and most importantly with no agreement! They just sent me another bill of 180$ For the about six magazines they sent me. I would assume they would send me more after I pay it but I don't think I should have to