Billing on my bank account.

I joined Zone Fitness a few months go and everything was good. Until recently, I didn't have enough money in my bank account which I understand was to my fault.<br> <br> What I didn't know was that they billed me almost every week the next month a R115 on my account for money not provided adding almost to a R400 in fees which I was liable for. I contacted the accounts department to query the fees and the lady told me over the phone that its called a Naedo which was put on your account. The thing is I totally understand that my account is in arrears and would be more than willing to settle the arrears on my account, but to bill me almost every week for R115 on my account is ridiculous. I'm a student and I work part-time and I don't earn millions and the money I do earn I have to stretch over a whole month. <br> <br> Please tell me if there is any way that I can make an arrangement to pay off the account. My banking details has also changed. Could you please assist me in this regard. Please contact me via email as my cell number is currently not working.