Cancelling my Contract without my permission

<p>On 12 May 2017 I contacted Vocacom's cancellation department to cancel one of my old pre-paid contracts that I don't use anymore. On the 31st of May 2017 all of a sudden my contract that I use everyday does not work, when I contacted Vodacom they inform me that I cancelled my contract on the 12th of May and migrate to prepaid!!!!!! I then inform them that I did cancelled one of my old prepaid but not this one. They then said there is nothing they can do for me. I then went to a Vodacom store in Thabazimbi where the lady there inform me that there is indeed nothing they can do, but I can open a new contract. I'm a client of Vodacom for the last 18 years and this is the services you receive from them. </p>