Incompetency at vodacom

I am having endless problems with a cancelation request I logged after 2 days of requesting an upgrade on my wifi deal. I received almost 3 to 4 calls confirming the cancelation but still got debited thr upgrade rates and received the upgraded data limit. I am not sure if the staff at vodacom are plain down *********** or don't understand what they have confirmed to carry out. I need this sorted ASAP and I want a refund immediately for the incorrect amount debited. See reference ***