Useless customer services - contract upgrading/accounts/aftersales

<p>I have upgraded from 5GB (R259/m) to 20GB (R568/m) in May using online service. I received the wifi-router on 17th May 2016. I had spent almost 5GB when I was loaded with a prorata data of 7.74GB x 2 (Normal and Night). When I checked my balance online it showed that I will be billed R789.25. I only expect to pay R259.00 for 5GB (old contract) spent and R220.20 for 7.74GB of pro rata (new 20GB contract) and making it to total of R479.20. I have called *** to *** and *** with no sucess. nobody has access to new system (useless), i was even promised that i will receive a call from back office. I cannot even use the wifi router as it uses mini SIM card and again no one can do SIM swap since they all do no have access to new systems. I hold for hours when i get transferred from one number to the other, others even speak to their leaders while i hold and sometimes others even hang up. I explained one thing X 30 times every I had to call.</p>