Withdrawal without convent

Hello So I have a big big problem with my FNB account. I’m being charged for items paid no fund since two months now. Now, after all my calculations I have a missing of R1215 in my account. I’m a student with no jobs so how are you expecting me to cover this with what I barely managed to have every month????? Please review this issues because I can’t stand more withdrawals without my consent and I actually want all my money back Thank you