Contract line suspended

Why was the money not debited its 2 January already just debit now already coz from May i have been paying debit order the onlytime i deposited its when u guys debited R800+ instead of the R540. I wish I could cancel the contract if I could but its a contract im tired of this poor service just do the right thing coz my language is also getting out of hand with your call center agents just fix this im tired of calling already just debit the money and open the line until the contract ends i will never add/take anything else from you guys cant wait for the contract to end im done dealing with vodacom.