#no funds available

FNB charged me twice (R100 x 2) for a Telkom amount that declined due to insufficient funds in 1 day from my Cheque acc. I immediately paid the amount via the Telkom app. 1. Why is this amount so high? Is it not R8.50 charged for bounced debit orders? 2. Why was it charged twice. Surely if there are no funds the account cannot go into over draft. I have no over draft facilities for that account. These bounced debit orders are a *******!!

Look forward to your response FNB Nicole