Not cancelling my contract

I cancelled my membership to Planet Fitness as I’ve moved to an area where there is no Planet Fitness nearby.

I cancelled in December, and was assured that my final debit order will be in January as that would cover my cost for the month of December. I have just been debited again, which is incorrect. Clearly the admin to cancel my debit order was not done.

It’s disheartening. If I was to return to an area with a Planet Fitness nearby, I’d probably second guess rejoining as the customer service is so subpar.

What’s the next step? I’m expected to sit on the phone again for extended time tomorrow to try to get my money back? And to ensure the contract has been cancelled? So unprofessional.