Double deductions of my account without authorisation

I am very disappointed with the level of service from FNB and I demand that the money that was double deducted from my bank account without prior authorization be reimbursed to my account immediately.

I have taken personal loan with FNB and I have mandated them to debit my account on the 25th as that is my salary date however FNB decided to debit my account on the 22nd April 2025 and there we no enough funds which let to the debit order returned unpaid and I got charged for that failed debit order, my expectations were they will still track when the salary hit my account and debit me but surely that did not happen which i was not really aware at the time they did not debit me after the failed attempt.

In this month of May 2025 FNB decided to double deduct without my consent or authorization which that let to some of my debit orders failing and costing me more.

I demand that they return that money they double deducted from my account because that was never authorized and it has cost me a lot.