Bad service

I received a call from a lady regarding my gym membership regarding my account, I explained to her that I had a crisis so can she change the starting date to November and she said ok. Then yesterday you guys tried to debit the money, but because there was no funds the debit order returned and now my bank charged me for a return debit order....Then to top it all a guy just phoned me now and he advised me that the starting date cannot be changed. So who is right here? So my account is sitting on -122 because you guys failed to update the system regarding the debit order, you guys need to pay this. This is such bad service and I just started with you guys....