Vodacom *******ly refusing to cancel contract at end of period

Vodacom has made it impossible to cancel my contact. I have been trying since mid-March to ensure that my contract expiring on April 2nd will roll over to prepaid, as I no longer want a contract. The first consultant I spoke to on the phone tried to upsell me numerous times to a new contract, before hanging up on me once it was clear I didn't want to. A second consultant tried the same, but then proceeded to seemingly cancel the contract. I never recieved any confirmation of the cancellation and upon following up discovered that it was in fact never initiated. I then tried the website's online chat support which ignored my question completely until I brought up reporting to the National Consumer Commission, after which they ended the chat. I have email the retention address and received no reply, so at this point I am convinced Vodacom is *******ly tying me into additional months of this contract and refusing to allow me to cancel. A warning to anyone signing new contracts with this ridiculous company.