Bad service from Upgrades

I was offered a upgrade and then took it, delivery never happened as the couriers got hi jacked. I then cancelled the upgrade and said they must not deliver i am not interested. I phoned several times to confirm and every time their was a different story. suddenly one day the upgrade arrived and i signed for it not knowing i could have sent it back. I immediately phoned vodacom and advised them that i have the package and they must collect ASAP as i cancelled the upgrade. no one ever phoned me back from the couriers and i phoned vodacom several times asking what is going on and every person i spoke to had different stories and promised the couriers will collect. i have tried phoning vodacom again and the line keeps getting disconnected and no one bothers to phone me back. I see now also I'm being billed for the upgrade. I have not paid my last account as i want this sorted and the package collected. I tried phoning Upgrades department again today 18.07.18 and got a automated messages saying the department is not available. this is utter nonsense and bad service from Vodacom. I wrote down some of my calls made. 18.05.18 Moja at 15.02 12.06.18 - Sasekani at 10.23 19.06.18 Lebo at 10.28

And every week after that but then the calls get cut ( i am phoning from a landline)

I even spoke to a manager in that department who also made promises and nothing happened. This upgrade was cancelled in the right time frame and i did phone several times afterwards to follow up.