Bad service

i ordered a samsung galaxy tablet for R259 online 08/10/2015, on 12/10/2015 i spoke to Mhlali who told me that she can't see my online application. she assisted me to do new application. on 14/10/2015 i receive SMS stating that my application is pre approved an amount of R48 550.99 WILL BE DEDUCTED ON MY ACCOUNT WITHIN 3 DAYS. I called again telkom i spoke to Gugulethu Khumalo who told me to forward her that message, i send her an email Gugulethu Khumalo (G) and she told me that it is a mistake she will send the query to back office to rectify this. on 15/10/2015(today) R48 550.99 was deducted from my bank account, i have been trying to get hold of Gugulethu and all i'm being told is that she can't answer my calls. no 1 is willing to help me and most of all i haven't received the tablet. I WANT THIS ISSUE TO BE RESOLVED IF IT MEANS I SHOULD CANCEL THAT ****** CONTRACT I WILL DO SO