failure to notify

Sadly the experience I have gotten from planet fitness is less than satisfactory. Having joined only 3 months ago I am already having hassles with the gym. I was told that my maintanense would b debited from my bank account in December,as per the contract I signed, but that didn't happen. It went off in July. Secondly when I go in to the branch I am told that my gym fee has not being been paid however I hve gotten an sms from my bank stating that my gym went of with out a hitch. So that brings me to my third point, now the staff themselves don't knw what is going as they are incapable of determining the solution. Why can't the gym jist send a message stating that my gym fees plus maintanense fee will be debited this month instead of just flagging when I decode to go to the gym...im not impressed with the way things are run especially with regards to the accounts department and now I will hve to make double payments or find the money,which I don't have, to rectify this matter.