Unfair charge

I made an online purchase with Takealot on the 7th of September of R464. Then the stupid double payment happened which I know was the bank’s fault. Now I have to pay a R150 because there were no enough funds on my account at the time the double payment which was done by the bank. I think that’s a whole lot unfair because I have never made payment for anything without funds in my account.

As the fault was FNB’s I am not liable to pay for that charge.