Paying R350 for a R299 contract

I upgraded 2 of my contracts on 11/06/2015 as per the ad it said I would pay R299. This was confirmed that the shop in Somerset mall. When I went back to query the wrong amount on my statement the consultant confirmed that I am being incorrectly billed. <br> <br> A case was logged #***4 on 16/07/2015 via email on 17 and 20/07/2015. Nothing since then and no resolution. The people that have NOT assisted me are Jowen Michaels, Donovan Daniels and Luzanne Prins. Based on the fact that they double bill the month after you upgrade they took R2471.43 off my account on 31/07/2015. Ive also sent them an email to cancel my other 5th contract that is due for an upgrade - no reply. <br> <br> Add in that Im still waiting for them to get back to me about a 35min call to the call centre and the poor customer service. This leaves alot to be desired.