Cancellation request being stalled

Last year I was threatened by them to be blacklisted if I did not pay outstanding account of which I knew nothing, as I have not received invoices or any sort of communication indicating that I am still a member. Reluctantly I paid to clear my debt and requested cancellation, as they require 90 days. Membership was not cancelled. Received a reminder last month to say yearly subscription is due. I immediately again requested to cancel my membership. They say they need 90 days, but I must still pay yearly membership. Each time I e-mail them they take a week to respond. I believe these are tactics to delay and not process my cancellation request. I offered to pay two months subscription to cover the 90 days, but not getting a response except that I signed contract, and the spew the clause about selling or transferring membership. I wouldn't want to put anyone else through this nonsense. I just want to cancel my contract without being forced to pay a full year membership.