Received a sms saying my bill has been credited but it hasn't been???

<p>I don't understand how it is so hard to get my account billing right, Iam being charged for 10gb of data I didn't even buy or ask for now looking at my actual statement</p> <p> </p> <p>I have fully paid my old phone so I should only be billed airtime R150 for my one number, my other is R380 signed contract total is R 530 but Iam being billed R977.99 ??</p>