Billing error still NOT fixed

I did an online upgrade on 20 Oct 2017 for 1 handset. 2x handsets were delivered and I had decided to only open, activate and use one handset. The second handset was only picked up on 09 Jan 2018. The last communication I had received via email from Vodacom was to advice then when the 2nd handset has been collected; which I promptly did. To date I still have not heard any further correspondence from Vodacom, as I was promised to get correct billing info, as I have been billed for 2x handsets from end of October 2017!!!! Three people from Vodacom had confirmed that the system showed I had placed an order for only one handset; but the system created two invoices within seconds from each other; which no one can explain as it is baffling to all.

Meanwhile; I am still billed for two handsets after all the drama. It is completely not on, compounded by not getting any feedback nor updates from Lucian at Vodacom