Blocked number for a contract I didnt agree on

I am writing this review with so much frustration the way Vodacom treat its customers, few weeks back I received a call from Vodacom telling me that my account is in arreas which to my surprise I do not know how because I pay the agreed amount monthly. I have a airtime contract with Vodacom for over 2 years which I agreed to pay R151.00 for airtime of R159.00, I was told that my number is blocked because I owe Vodacom money for Data, I never agreed on a data contract, my contract agreement with Vodacom was for airtime only. The consultant that I spoke to about this issue advised that it can be reversed since I never agreed to a data contract, she then transferred me to the Vodacom sales consultants depart which the phone rang for more than 20 minutes until the phone hanged up. I called again the next day and I was told the Vodacom contracts sales consultants knock off at 5pm daily I should call the next day, every time I call and state my complain I have been sent from pillar to post yet my phone number ( ********** ) remain blocked..this is the reason I will never renew my airtime contract with Vodacom again the same nonsense happened the first time I took the airtime contract where the sales consultant decided to add the 250 MB contract on top of it, I called and requested that it should be stopped now the same ******* is happening without my permission, retrieve the calls when I agreed to a contract and listen to what was sold to me and what I agreed on I am very annoyed.

I cannot do any banking because my number is blocked.