Incorrect Billing at Telkom

On the 15 Aug 2018, I contacted Telkom to up my 4meg line to a 10meg line. (order ********** 33) They mentioned a tv box and a modem will be sent to me. (order ********** 8) only the tv box was sent. On the 17 Aug 2018, I got an sms to say my Telkom service nos is ready for use ********** 68 and will be billed. I called Telkom to ask if my 10meg line is active, they said no I am running between 2-4meg line and won't be able to connect until i have this modem. But from the 17 Aug 2018, Telkom has billed me for a line that I have not received. The following week, they cut my phone and adsl line saying that my account has been suspended due to a credit limit ********** 93. I had to call again to rectify this error, so a week I was without a phone line and adsl of which I paid for. Eventually, my landline and adsl were back on at the 2-4meg line. On the 30 Aug 2018, I called in asking about my 10 meg line, they mentioned they were out of stock of modems and mine will be delivered soon. I get sms on the 30 Aug 2018 to say that case nos ********** 2 and case no ********** 4 has been resolved but nothing was done to resolve my upgrade to 10megs. I have been struggling since August for a 10 meg line besides waiting for hours to be helped over the phone, if you not at the right nos or department they put you through and the phone goes off, you have to call again, and when you do eventually speak to someone, they offline.... last month I asked them to cancel everything, my bill is increasing every month and now they charging me interest, for a line I DO NOT HAVE. They have disputed my account bill numerous times and no one has corrected it or gotten back to me. The service at Telkom is very disappointing, for a telecommunication company communication is really bad. I refuse to pay this bill as it is incorrect and in fact Telkom owes me for suspending my account for a week of which I paid for.