Worst experince ever with Vodacom

I got a call from Vodacom for an upgrade since I was due for it. Then I chose a router but when I received it on the 02.10.18 I realized it was a new contract instead. I then called them back to send a courier to fetch it .It was fetched on the 04.10.18 and I was advised to call after 43 to 4 days to check if they received it. I did and was told they have. On the 27.10.18 the debited my account including the router which was claimed to have been cancelled I called them and they told it was a mistake and will be credited back. Nothing happened then on the 02.11.18 I went to my bank reversed it. So I paid cash foe my normal monthly installment of R212.52 same day. From then I have been receiving sms's that I owe r477.18 when I called and asked them they say it is because they debited the account the there were no funds and the R100 is because I cancelled the router.Then now my line is been suspended so I called them and they just advised me I owe R701.47 because I did not pay last October and November. I asked to speak to the supervisor they just let my phone to ring for 9 minutes then it went dead. My first ref no is : ********** ********** 4683@1620 where I had spoken to Ayanda. Then the other one is 1_ ********** ********** .I asked them for a settlement for this account as I am sick and tired of this nonsense and was told since my account is in arrears they cannot do that.