Cell C *****s from customers

I recently contacted Cell C regarding my existing contract that was upgraded in March. I did a Sim upgrade and was told that there was no additional costs , however when I was debited on 1 May, Cell C deducted a double amount plus Vat. When I asked them why they deducted a double amount they said it was a pro rata amount. I think Cell C are ******. If you upgrade online there are no fees. When I asked the sales person during the upgrade process if there were any hidden or additional fees she said no, only the normal amount as per contract. Now 2 months later they take a double amount plus VAT and justifying it by saying it is pro rata for the month I upgraded. In other words Cell C is *****ing millions from customers and people just accept and pay. I no longer want to be a Cell C customer and will be discouraging all of my contacts to not support this company.