Contract Upgrade - hidden costs

I upgraded my iPhone contract with Telkom on 14th Jan. 2016.<br> I had to do this through the Apple Store as Telkom didn't have stock, but they sat on my application for a month without bothering to notify me of this small detail.<br> I eventually obtained a R549 p.m. deal and collected my new iPhone 6 Plus from the iStore, at an additional charge of R150 by the iStore.<br> My first invoice for the new contract duly arrived on the 1st Feb and came as a complete shock. I had been billed for R1743.79 ....!! <br> And the address was completely wrong. I called the \Customer Care\" helpline and carefully went through all the incorrect details and overcharged and/or incorrect amounts. The consultant agreed that certain items needed to be reversed and that someone would phone me within 72 hours.<br> Of course, this didn't happen and I have since spent hours on the phone trying to get something done. <br> Long story short - the full, queried amount was pulled by direct debit on the 29 Feb. and I have now received a second invoice, payable at the end of Mar. for R1097.00 - still way over the amount I signed up for.<br> Is there not a \"higher authority\" that I can take this matter to?"