Poor service and resolution from Vodacom

I called Vodacom to cancel my wifi router contract and I was informed that I upgraded my contract in May (2 Hauwei phones were taken) which I didn't do. I informed them that it is ***** as I didn't upgrade my contract and would therefore like to cancel. I also informed them that I did not receive my data (5 gig) for June. The lady informed me that they loaded R165 airtime to my sim card. I informed her the sim card is in the router and I haven't received any airtime. The lady informed me that my issue will be resolved within 7 days and unfortunately I can only cancel the contract once their ***** department has finalised the investigation. 7 days later I call to follow up and I was told my case hasn't even been allocated to anyone for investigation. The lady then promises me that she will call me to give me updates until the issue is resolved. She called the following day to tell me she has forwarded my case to the ***** department and that was the last time I heard from her. A few days later I called Vodacom to follow up on my case and they informed me that my case has been cancelled because they tried getting hold of me and even send me an sms which I did not receive. She forwarded my to the accounts department which forwarded me to the "*****" department - only to find out I was forwaded to the insurance department. The insurance department couldn't help me and so they said I must call 082 111 as they didn't have the ***** department's numbers. I call 082 111 and the guy says all their departments are off line and i should send an email to the ***** department. Or alternatively call them on a line that is not free. So disappointed in Vodacom because ***** took place under their watch and its taking over a month to resolve the issue. On top of that I am being harassed by their calls saying my account is in arrears - mind you the amount in arrears is due to the R1699 I reversed from my account because I did not authorise the upgrade. I will never buy anything from Vodacom after this.