Telkom ADSL - 2 months no internet

My ADSL line has not worked for almost two months. I have, however been invoiced for the full amount. A lady from Telkom phoned me and assured me that I would be credited for February - I need to phone and dispute the invoice for March at the end of the month. I honestly don't feel that this is fair. I entered into a 24 month contact with Telkom and I expected them provide a service, instead I find myself phoning call centres every month to try and rectify issues. This contract has been nothing but a hassle since the first month (August 2017).

I am extremely unhappy with your service.