Cellphone Banking overcharge

On the 31st of August I used the FNB cellphone facility to purchase R30 airtime. I used the preset top up option that FNB populates under my personal options based on my purchase history. Instead R105 was debited to my account.To date I have not received any airtime but have been charged.

I called their call centre and was told by and agent named Gugulethu Shiba lala that I did select R105 and that the airtime should be loaded to my account withinhas 24 hours.

Days later still no airtime just a debit to my account for goods not delivered.

Please refund me FNB.