Inability to provide promised service and atrocious customer service!!!

Nearly two months ago I contacted Telkom regarding my ridiculously slow and intermittent LTE connection. Supposedly the fault was logged yet it took 2 weeks of continuous follow ups to realize the case was logged incorrectly. After another 2 weeks finally I was assisted and a technician assessed the situation. Apparently the node of the tower was pointing in the opposite direction of my flat explaining the terrible and often non existent connection. A few more weeks have passed with no feedback nor solution. I had no choice as to cancel the service. After cancelling I'm being told I need to pay for the remainder of the contract period. I spoke to an agent who assured me she would escalate the case and assist me, just to find out that she logged the cancellation case as closed and nobody has contacted me since. I want this contract cancelled with immediate effect and the balance for the remaining months to be waived. This type of service and treatment of customers is atrocious and simply unacceptable. I feel deceived!!