No luck in canceling my contract.

I logged numerous cancelation requests in at Vodacom to cancel my contract.<br> <br> Every time they open a service request and nothing happens.<br> <br> I logged a service request in on the 29/10/2015, in order for the admin department to contact me, nothing happened they closed the service request as resolved, though nobody called me.<br> <br> I want to cancel my contract as the Vodacom coverage in my area recently gotten bad, and Vodacom previously informed me that they don't plan for any upgrades in my area soon.<br> <br> This is frustrating as every time I contact the Cancellations department it takes me about 30min of holding and then I'm informed that they must log a service request, and nothing comes from the service requests.<br> <br> Please assist me in order to cancel my contract. (P.S. The number supp**** are not the contract number, this is the number Vodacom can contact me on.)