BEWARE: Extremely difficult and time wasting to cancel a subscription during the free trial period

When trying to cancel through the portal, the only available path is to call the number, however after multiple calls, a lot of my time wasted on hold and a request for callback I have still not been able to cancel my subscription. 

You can't even raise a cancellation request via the support form - it just disables the forms and tells you to call the number. 

This is unnecessarily difficult - if you have the technical means to build accounting software then omitting the ability to cancel a subscription automatically via the portal is by design.