Price not displayed

I bought data on my app today for the first time in a long time as I'm on contract and use *123# I was trying to get the 10g deal for 99 rand. I went to the page to buy and chose the data but there wa no price so I clicked the 10g mobile data and assumed the next page would give price it didn't and then it asked me to confirm and I assumed ok price would be next page but it wasnt it comfirmes purchase and I got sms after saying price this is unacceptable TELKOM! I WANT A REFUND