Please don't take a contract with these guys they are not able to be reached and ignore cancellation emails

Please don't take a contract with these guys. I have been trying to cancel my subscription for a year to no avail. Finally someone emails be back this year saying I owe them money. This was after I got a message from the help desk in January saying my subscription was cancelled. I tried to cancel the subscription in January last year, but I was told I was locked into a contract for a year. I paid for a year and reminded them in October that I was cancelling in January. They now want to add more amounts for 2019 after saying I was cancelling and getting a confirmation email saying my cancellation email was recieved.