POOR MTN SERVICE

I bought a Huawei LTE Router from MTN CAPE GATE on 14/01/2018. As I was aware that our residential area was due for fibre installation in the near future I did not want to enter into a 24 month contract. I paid for all the hardware in the store and entered into a 20GB month to month contract with the view to cancel this contract as soon as the fibre installation to my house was done. Fibre installation to my house was done in June 2018. Since the beginning of July I went to the same CAPE GATE MTN store to have this contract cancelled. I have spoken to 4 Counter Consultants only to be informed that MTN Head Office made a mistake in capturing the contract information and there is nothing they can do. I tried various times to contact MTN Head office myself only to find that their voice directed answering program does not allow the option to speak to a consultant. As I have 2 other contracts with MTN I cannot stop payment for this contract.