Charged full amount for Phone on Contract

I took out a Telkom mobile contract on the 19th of October and received my iPhone 6 Plus 16GB on the 21st of October from the Telkom Direct store in Vincent Park. When I looked at my bill, I saw that I have been charged R400 for the phone even though it was taken towards the later part of the month. I should have only been charged for 10 days in that month. No one has been able to help me with the inquiry after phoning your customer call center.<br> <br> Please can you correct this mistake. You cannot charge me for something that I haven't used especially for a subscription based contract.