Holding me to a 60 month contract without canceling

Contacted Capital Magazine Service today in response to unsatisfactory service.  I had called earlier to complain about the offensive "bonus magazines" I was receiving.  They agreed to cancel this feature.   Have only received two magazines that I requested and they are charging my bank card.  I called today to cancel and was told I had made a commitment to the publishers for 60 months.  They told me they would play the recording of my agreement.  My response was I did not understand the terms that I had to pay, rather I was guarented a 60 month rate.   There appears to be no cancellation clause.  I was told I can cancel ant time but I would be billed for the full term of 60 months.  Several years ago they contacted me and I was able to cancel then without the threat of continued billing.  I don't think their business practice would hold up in court.