Runner's World Claim that I have a continued subscription, eventhough I haven't continued subscription and now have to pay Harlan IA

I won/traded mycokerewards points in years ago for a Runner's World subscription for one year, which was 3+ years ago. i haven't subscribed to the magazine size, but still recieve them in teh mail. I got an invoice stating that i have to pay subscription, which i haven't continued.

I googled the address and found that other magazines share the same po box, city, state, AND zip code, as well as stating that there are additional scams.

Won't be paying and if they still send them, i'll still collect them