Leasa D.

I was informed today while on the phone with a representative that I missed a payment a year ago due to card expiration, once I had updated my card, which I did, I was supposed to process the payment that got denied due to expiration, but I didn't know I had to do that, nor did the website inform me I had a payment due in this whole past year. Because I missed that payment, Worlkmark just took my travelshare away from me, something I paid for years ago, without informing me. This seems illegal, but there is nothing I can do about it. How do I get rid of Worldmark?