How to cancel an Aira fitness account?

I cam across Aira Fitness on Instagram where I could pay $1 to join a 28 day online challenge. I was hoping for some legit workouts or a proper meal. None of which I received. I want to cancel my registration because this was a terrible waste of time and I’m afraid they are going to bill me since they have my banking details at the end of the month. Michael Bell responded to an email where he told me to ‘just head into my membership portal and press the cancel button!’.

Only problem is this website is so terrible and there is NO CANCEL button.

Michael Bell has not responded back when I asked him what to do if no cancel button is available over a week ago.

How do I ensure they do not take money from my account when I cannot cancel?

Such a scam!