Contract cancellation nightmare...still

I posted this complaint two days ago and still no callback & no resolution. I wanted to cancel my contract due to bad service, but now due to bad service, I cannot even cancel my contract. My previous complaint....I've called in to ********** a few times to make sure my contract will be canceled, and every time I call in there are all sorts of stories. This month WILL be my last payment if Vodacom has not canceled the contract that is no longer my problem. There are voice recordings that prove I have phoned more than once. And if you blacklist me I will take this matter further. The agents are ***********, they have excuses like "your number is on our old system, I'll get my colleague to check whats happening and we'll phone you back" ARE YOU KIDDING ME???? What sort of service is this?