Fnb is a ****!

Fnb is just a bunch of Lairs, the claim. That I bought the airtime and called myself on my other number, tell me how stupid is that and how could I call myself on a phone that uses dual Sim cards to call one another? I've tried it now and their theory is just bullocks! They ***** people's money and act like it's their own fault that their money is gone! How can one buy airtime and then phone themselves until their airtime runs out using the same phone?