never ending phone contract!!

I have tried on several occasions to get Vodacom to notify me, as they should, of a number up for renewal after 24 month contract they have not done so In the past 4 years and I am still paying a debit order on I phone I dont use!! I refuse to pay to get out of it. What about the consumer protection act! Is it really so hard to let your customers know in advance! I want to cancel this contract asap. And if it cant be resolved Im going to close all my accounts with vodacom.