Pathetic and shoddy service from Vodacom

I have had the worst experience with Vodacom. I have been a Vodacom client since 1997 and cannot wait to cancel my contract.

The organisation I previously worked for entered into an agreement with Vodacom as part of a larger transversal contract that Vodacom had secured with National Treasury. When I left the employ of my previous employer on 31 August 2019 I completed forms to transfer the account (my original number) into my name. There was no change in device (it was my device as part of a contract with Vodacom before my company switched to Vodacom). Three months later and I am still unable to use the phone despite having paid a monthly instalment of R672 which covers the entertainment services of R188.79 which I have not used since I cannot use my phone or requested; handset instalment and my subscription of R302. I have been on the phone with Vodacom since 2 September 2019 and have visited Vodacom stores who have been unable to assist. The call centre keeps requesting me to switch off my device for thirty seconds while they reactivate the line - to no avail - who can I call as I need the device to work ?