Frustrated customer

Good day, can you please help me as fnb is taking me from pillar to post i was de*****ed money on my fnb account and now fnb in turn does not want to refund me the money, claiming that im the one who authorize for the money to go off my account, how on earth can i clean my bank account when there is still debit orders that must still go off the account, I've logged the complaint with their ***** department and as well as their other department with the care email address, with no assistance, the ***** department said that they will not refund and didn't even have the decency to have proper communication regarding that, i had to follow up at their branch and this morning the 21st of july 2025, a lady from their ***** department called me and said their management said they cannot refund me, the least they can do is refund me R3000-00 (three thousand rands only) how on earth can they refund that kind of amount when i was de*****ed over R11000-00(eleven thousand rands) i refused the R3000-00 refund offered by the lady, so can you please assist me as i find this very ********* from fnb, when I've been nothing but a loyal client of theirs.