Bad management / service

I pre-registered for iphone6s. Then the online services called me for the upgrade. I was offered the upgrade at R999pm. I then saw on the date of the launch that the price was R899 plus free 1GB data/month for 3 months. So I phone customer care, who transferred me to after-sales, who then transfer me to upgrades and then blamed online sales and transferred me to the lady who did the upgrade. I was assured from her and the team-leader/manager that Vodacom provided them with the wrong \deal codes"and that it would be corrected and I should not worry at all. <br> <br> I got my new invoice today"