Incorrectly billed & lack of feedback

I did an online upgrade on 19 October 2017 for one handset. Two same phones were delivered the next day. I had battled since then to have Vodacom sending a courier to collect the second, unused/unwanted handset. Eventually the second hadset was only picked up second week in January 2018. I had adviced Vodacom accordingly as soon as courier collected on 09 Jan 2018. I had subsequently received latest statement which still refelcted being billed for two handsets. All emails I had sent since then have not been rep**** to in relation to the status of my account. I even made follow up calls in the morning of 17 Jan 2018, but all I could be told was that the credit is still pending on the system and not fully processed. Then shockingly Vodacom disconnected my line in the late afternoon of 17 Jan 2018. Calling the customer care has been useless and no one seem to know what is happening. If you are reading this and contemplating doing business with Vodacom I would say think carefully and weigh up all the options as clearly this is not how the best S.A network should be treating loyal customers at all.