Being Billed, no explanation

hot my phone through sell direct. Was Billed R349.00( which i was told it would show as a credit but it is not) on the 9th of September. Phone arrived a week activated 5 days after arrival. I used the phone for a few days then discovered its not what i wanted, filled out a cancellation form and had the phone collected by the 25th. I received an invoice for R698.70 which includes R445.20 monthly recurring fees( was my fee not 349.00) and 200.00 activation fee. you charge for activating a line? this was not conveyed to me. I am aware that I used the data that i do not mind paying for. Everything else i need to be explained to me, I have been on hold for the past 2days and trying to get help with no luck. I will be blocking the debit order until someone calls me back to explain coz this is all ridiculous. It was a fault on your end and now i am paying the price for it. <br>