Cancellation dispute

I sent an email to [Email Removed] on the 03.03.2015 giving notice to cancel my contract. Today is the 12.03.2015 I have had no automated response to say you received my email or even a email back to say it has been actioned. Then I get communication that my contract is set to Terminate in June 2016. What a joke. I call into the call centre and a Agent by the name of Kurt puts me on hold forever to find out whats happening and claims to not see my cancellation on his system. I then speak to his Manager Sandile Thekiso who promises me feedback by Close of Business Yesterday the 11.03.2015 and guess what I AM STILL WAITING. I want this product cancelled when it reaches its contract end date which is 15.04.2015. SOMEBODY PLEASE GET BACK TO ME!!!!