Cancellation of membership

I am disgusted by the service received from Zone Fitness promenade Mitchells plain.. i have requested that my membership be terminated as I was unable to pay this membership due to reasons given to the consultant i spoke to. An email was sent to them regarding this too and i have stopped the debit order... I received a call lastweek whereby the consultant was rude and persistent in getting a payment out of me.. I explained my reasoning and the consultant laughed (very disrespectful). i have not been to the club or made use of the facilities and therefore also requested that it be cancelled. I now received notification that i have handed over to credit works for non payment... i need this to be sorted out immediately or we will take this further and involve ombudsman.. As per CPA i am allowed to cancel this contract..