Bad customer care

I joined planet fitness on the 30th of Sep and on the 1st of October my debit was meant to run but it didn't, went to the gym a week later and I was told that my account bounced back and I am not allowed at the gym - what an embarrassment. I went on to find out what happened and only after 3 weeks I get a response to say authorisation was not logged in and I will have to pay double at the end of the month and of which I refuse to do. Now I want to cancel my membership and they are telling me stories which makes me so mad and I need management to contact me because I don't have that money it doesn't grow on trees. I refuse to pay for services I didn't use and I want to cancel my account as of immediate. Portia (Ntombikayise)