Amazing vouchers don't disclose to clients their terms before signing up people

I signed up with the company in 2017 while I was a student and I took a contract of 12 months with the company. I am still a member today in 2019 even when my contract term has expired over two years . During the time I agreed to the contract I thought I would get good deals but everywhere I went they told me that the company was not recognized. They did not explain their cancellation policy clearly and when I them to cancel my membership they telling me about a six month cancellation fee, had they made me aware of this while telling me about the products I would have not agreed to their membership. Now they want to try and get money out of me even when my contract has expired because I want to cancel and have not made one payment to their subscription. How can I pay for something that i can not benefit from? How do i get them off my back.