Nothing done. Contract is still billed even when I cancelled it on time

CG intractable still not cancelled after I told Vodacom I cannot afford two contracts. I did cancel the upgrade on time but Vodacom is busy billing my account everymonth because they have access to my account. I don’t want this contact. I cannot afford it. I will now report this matter to the ombudsman because they are not doing anything about it. I have contacted Vodacom so many times.