Greedy Planet Fitness

I cancelled my month-to-month membership on the 2nd of September, which was on a Monday. When I phoned to notify Planet Fitness the agent told me this will result in a another month's premium to be deducted because I didn't notify them on the first, which fell on a Sunday. The agent said I could have mailed them, but I did not find an email address to do this. One of their own answers for a FAQ on how to cancel your membership only provided a number - ***. Nowhere in my life have I ever faced this. I have resigned from jobs that also required a calendar month's notice and I wasn't penalised. I have stopped other contracts on the first working day of the month and this was accepted.

How can a system or organisation be so greedy, to deduct another month's premium after the fact that I am cancelling my membership because I cannot afford it anymore. Corporate greed at its finest! Don't care about customers at all.