Can’t find how to cancel – TapeACall Pro: Call Recorder Review

I want to cancel my subscription to this stupid app that I do not use, but there is no visible way to do so. Subscribe at your own risk. It works a lot of time but not all of the time. It’s clumsy. And they apparently make their money by making it impossible to cancel. Tapping the support icon here in the App Store leads to a missing page (404 error). Their support is literally MIA.
Review by Davesque on TapeACall Pro: Call Recorder.