BAD service!!!!

I am extremely disappointed in the service recieved from Telkom! We installed our Telkom uncapped WIFI 27 September 2019. When we app**** for the WIFI, I gave my account details to Telkom and my debit date. Since installation, we haven't heard a word from Telkom! First month came, no debit order went off. Second month came, no debit order went off!!! We have phoned them 6 times to query what is going on, why arent they debiting my account? They said they will get back to us. They phoned me a month ago to find out of I am happy with their service and I said no and explained the debit issue. The guy said he will follow up on what us going on. Again, havent heard anything from them! Today 19 December 2019 I phoned again to find out what is going on, we got told we had to phone them to provide them with the correct information on which I said I did do that 6 times! I told them I want a bill right now to see how much I need to pay! They send me a bill of nearly R2000?????????? With a R950 penalty because the apparently send me bills but I dont pay! I have never recieved a single email from Telkom stating this!!! Thats why I have been phoning them! Sometimes I phone them then no one bothers to pick up the telephone??? How is this fair? They told me that if I refuse to pay up front they will cut my line and blacklist me! This is their mess??? Why must I phone after them to pay them money for a bussiness THEY are supposed to do? Not once has anyone told me this is what I am supposed to do??? The lady that phoned me upon installation also verified my information regarding my account details and debit date? Has this happened with someone else? What legal course did you take? I am not paying a penalty of R950 for their mistake!