No service and taking money for no upgrade

2nd complaint for same issue since October 2017. Customer service could not give me feedback on my account query after I upgraded in October eventually I was referred to vminds email. There no response. Then escalated via a vriend at Vodacom. Finally they deigned to contact me, they could not access my account and give me a breakdown of the costs adding up to 700 for the month. Eventually they told me I needed to return the phones and cancel the upgrade. So I sent back the devices in Nov, after they committed to only being able to solve the billing that way but they promised that the deal could be reloaded as requested in october and the devises sent back to me. Then vminds started ignoring my mails. Upgrade was not cancelled even though phones were returned. Monies are being taken off my account for an upgrade I don't have. I finally went in to Menlyn shop and they were able to access my account and give me an exact breakdown of my account, there was never anything wrong with the upgrade, it should not have been cancelled and the correct info just provided to me in October. Now they just continue *****ing my money and the poor people in store cannot help as this deal was messed up by online and they cannot fix it. And online refuses to respond.