bad service and not getting feedback as they say

I've been calling for almost a months and I'm being told lies. The first agent that I got said my contract will be cancelled and I will get a call within 3 to 4 days, 3 weeks passed. The second one yesterday she assisted me however the line was bad and at least I got the reference number for the call. Today when I call there's no option to contract and when i ask the prepaid agent to transfer me to contract, she transfers me to the ivr how sad. Then called again to ask for the contact number for retentions/cancelation department this agent tells me that they don't have. This is really irritating and to me that's bad service. What must I do to get help from mtn? Its very annoying to call this customer care for weeks and no response. BAD BAD BAD