Bad service at Planet Fitness

I emailed planet fitness requesting to change my debit order date from the 25th to the 1st of the month, they rep**** that an agent will call and on the, I was advised that they will not be able to change it after verification, I needed to complete a long form on WhatsApp, which I was not happy about but I did complete. I never confirmation that it was changed, I went on my banking app and noticed that they has sent a request to my bank to change it which I verified on the app.

I went to the gym 3 days ago and I was told I was blocked from entering the gym as I have not paid. The embarrassment I felt, then I was told that Planet fitness tried to deduct a double debit off my account of which nobody informed of this and nobody explained to me that this is what would happen with me requesting to change a mere date. I am livid as I cannot go to the gym and I cannot just cancel my membership because the want me to pay to cancel, to say I am not happy is an understatement. I sent 2 mails to them and todaye nobody has called me. Over a year they have been receiving money from me with no glitches.