service from telkom

Telkom has installed a wireless network at my residence, and since this installation their has been problems with receiving the correct download speed for which I am paying for. I logged a fault with concern to the download speed that I was receiving. a fault no registered and it was stated that it would be rectified within 24 to 36 hrs. I phoned again after that time frame and still no result. the fault was apparently exculated. I also asked to speak to a manager , where he stated that he will also exculpate it and I am welcome to contact him on the next day. of course I did this the next day, on which when speaking to me he stated that I must in the future not ask for him directly as this makes him look bad, he also stated I must wait until they build a tower in my area for better service, he also stated that if I am not satisfied with the service I must cancel my service at Telkom not understanding I signed a 3year contract with Telkom. This manger has no s****s in understanding the frustration I have for paying for a service that I am not receiving. the manager stated that I cannot keep on exculating the problem and showing my frustration towards the call centre. Telkom spends vast amounts of money on adverti*****t to get people to by their product and this client service manager just states if I am unhappy I must cancel contract. I personally do not what to do further as their is no resolution from Teikom side