I am billed for their mistake

I took a Samsung Galaxy S6 Smart plan 100 and got my phone on 1st Friday May 2015, when I got to shop to pickup my phone it was a S6 edge. So they took back the phone and gave me the right one after 2 days from Wednsday. Now I getting billed for that S6 edge that I did not take, the one that they took back, because they have already activated by mistake. Ever since that day I took contract I have been battling with this issue up until today. I got an sms yesterday saying I must pay R8565.67 or my account will be suspened in 48 hours, this amount I am told is for cancellation that was not my problem in the first place. I have been charged R100 by the bank because Telkom tried to debit this amount at the end of last month. <br> <br> I want this matter fixed and I want Telkom to also refund me that R100 charged from the bank because they were not suppose to debit me that amount. They have promised me before that this will not be a problem, but it is now.<br> <br> Khayalethu Prudent Nojoko<br> <br> <br>