DISGUSTING SERVICE

I have been a customer for more than 20 years and never had a complaint, however I am livid right now ..... I have a contract that was automatically updated without my consent or knowledge. When trying to cancel the contract I keep getting notifications to say "You will receive an SMS and Email with your exact cancellation or conversation date ....." After 3 calls still NOTHING, so I tried to cancel the debit order at my bank which I advised is not possible and I have to go directly to the supplier. I marched off to the Vodacom shop in Springs Mall to be told they cannot do cancellations or cancel debit orders in store. I then phoned the number supp**** to be disconnected 3 times and when I eventually got through was advised my number is not recognised. PLEASE PLEASE PLEASE - can someone attend to this matter !!!!!!!!!!!!!!!!