Zoom Scheduler

I am currently on a free trial for Zoom Scheduler.  I was informed that the trial will end in 3 days time and I do not want to continue.  Is there an option for not wishing to continue when the trial ends?  I tried to stop it today, but Zoom just assumes that I want to buy it, but I don't.  I did not even want to be on this trial.  I just clicked to look which I find rather underhand.  This is no way to treat customers.