Can't get out of contract with Spacesworks

I signed up for Spaces Works' virtual office a few years ago. I only signed up for the virtual receptionist. It started out fine, but I noticed that I misunderstood the amount I was going to be charged. After about a year I decided to cancel the virtual receptionist, because the quality of the connection was not great (I was battling to have a phone conversation) and it was rather expensive. I contacted Spaces to cancel the contract, but I was told that I need to keep paying for the whole contract term and that I need to cancel it on the app. I've searched high and low, but can't find the function on the app. I've read their online guide, but it is inaccurate. I logged in online, but the page where you need to cancel it is blanked out. I've had my personal assistant try to cancel it as well. No matter what I do I can't get out of this contract.